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street legal 2-strokes

  1. #1051
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    good you got to test, bummer it's still there ... how did the bike feel with fatter mains? did you keep one of them in?

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  2. #1052

    Re: street legal 2-strokes

    epic ride day!

    beaumont after a rain is EPIC classic SoCal riding in the hills!

    started out like this



    oh, let's just turn down here



    ok



    awesome



    wheeeee!!



    oh shizz



    okay, screw you guys



    gorgeous!



    omgoshhh



    BRAAAAAAP



    daaaamn



    find the bike doing the hill climb!



    it was a lug in 1/2/3rd gear sort of day

    first real "dirt bike" ride since the rebuild on actual trails...I stalled a lot

    it was only until later in the day, on an uphill whoops section that it clicked: STAY ON THE PIPE....at a critical point, the front floats, and the back is smashing and the bike just flies. Can't be afraid to WOT that bitch and she likes it.

    @typeone - on pavement, it felt about the same I went back to the "stock" 340 main since that's the jetting recommended by the manual for the temps I'm riding in (plus not much WOT sand).

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    Last edited by breakdirt916; 03-16-21 at 06:13 PM.
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    1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:

  3. #1053
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    damn that looks fun, nice ribbons, seems some good moisture in the soil as well?

    regarding stall + stay on pipe comments, do you have a flywheel weight on that bike?

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  4. #1054
    ^ It's my bike and my car tls25rs's Avatar
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    Re: street legal 2-strokes

    Wish we had trails like that closer to the Northeast. I'd take a road trip to go ride those now and then but Cali is a little far for a road trip.

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  5. #1055

    Re: street legal 2-strokes

    yeah! great moisture, and tons of fun!

    would recommend, but I'll be honest - the epic spots like that, are partially not legal, just tolerated...and slowly disappearing. Still plenty of legal OHV spots, but this specific location is where the Crusty Demons used to film. Bucket list spot...I'd also like to see Reche canyon. Best to go mid week, and go w' someone who knows the area to connect the single track and ridges riding.

    Quote Originally Posted by typeone View Post
    damn that looks fun, nice ribbons, seems some good moisture in the soil as well?

    regarding stall + stay on pipe comments, do you have a flywheel weight on that bike?
    just your typically goon riding. When in doubt gas it out.



    no flywheel weight, but I don't imagine it would help as much as a right hand

    and I refuse to add a FWW until I've sorted the timing and added the mods I've already purchased for it LOL

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  6. #1056
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    Quote Originally Posted by breakdirt916 View Post
    no flywheel weight, but I don't imagine it would help as much as a right hand

    and I refuse to add a FWW until I've sorted the timing and added the mods I've already purchased for it LOL
    cool, makes sense ... was just wondering because a FWW made a nice difference on my '97 CR250R back in the day. bike would slow-walk, sans-stall, amazingly well for an MX'er.

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  7. #1057

    Re: street legal 2-strokes

    nooooo....don't tell me that!!

    it may cost me more money

    but yes, I'm very curious.

    I always felt like it's the rider, not the bike. That real "dirt bike ride" showed me that I generally ride at 20-40% of what the bike can do; and only on that day (in a group) I was pushing at 80-90%...and guess what? the bike could do it! Granted it felt like my risk exposure goes up A LOT at 80-90%, but man does the bike feel like it's flying!

    but the rest of the time at 20-40%, yes I'm wondering if a FWW will help me at the lower speed stuff. Stay running; don't stall, more tractable power on loose hill climbs.

    meanwhile, 7:15ish sunsets = I could be at an OHV area by 6:30pm and ride until it was too dark



    then ride in the dark

    Lighting review:
    1.) BAJA DESIGNS + HELMET LAMP COMBO IS AWESOME
    2.) the low beam/high beam baja designs relay makes a huge difference. The 4% is equivalent to what those cheap amazon lights put out...and keeps my battery from being drained at idle or hopefully not blinding oncoming drivers. The high beam/full intensity at 26W is remarkably good for an LED at throwing light far...I do, however, need to aim it down just a little bit more. It only has one adjustment and it's cranked all the way down; so I'm going to just drill the plastic bracket mount a little bit to slide the screw back.
    3.) headlamp - I'm a little sketched out about having a wire dangling off the side of the helmet. I need to route the wire safely to the side and leave slack.

    How come nobody just mounts the battery to the back of the helmet w' a gopro mount or something?

    no obstruction. No wires to randomly pop off when you take off your helmet and/or backpack.

    still haven't adjusted the timing I just wanna riiiiiiddddeeeee

    STORAGE: my friend is right, for dual sport: the MOST you should need is a dual sport taill pack (bolted to a rack or rear fender). *just* the tools to get home = trail stand, axle tools, 8/10/12, bit driver, pliers, elec tape, spare plug, plug wrench, quick steel, swiss army knife, etc.. Get that weight off your back. I just can't figure out a clean way to carry a 21" front tube...but on the other hand; if I ran nitro mousse in a 2nd set of wheels I wouldn't need it. And make sure your bike runs 100% before you head to ANY big dual sport run. Water and snacks in the Kriega, spare goggles, with space to carry a rain shell if you get cold. But keep your setup modular: Giant loop mojavi bags are *just* for carrying an extra gallon of pre-mix for Death Valley.

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    Last edited by breakdirt916; 03-29-21 at 01:07 PM.
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  8. #1058
    Lifer
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    Re: street legal 2-strokes

    Just a note: A 21" tube will fit both front and back tires well enough to get you home. No need to carry 2 sizes. I used to keep one in my fanny pack, or zip tie one to my forks or a frame tube. No matter where you keep it, you have to check it once in a while, as it will chafe enough to wear a hole. Since I started using Bridgestone UHD tubes 20 years ago or so, I have never gotten another flat, so I do not carry one anymore.

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    Last edited by gregp; 03-29-21 at 03:09 PM.

  9. #1059

    Re: street legal 2-strokes

    Well, it’s been a great run. I sold the YZ250!

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  10. #1060
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    Quote Originally Posted by breakdirt916 View Post
    Well, it’s been a great run. I sold the YZ250!

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  11. #1061

    Re: street legal 2-strokes

    April Fools!



    Not usually my kind of humor; but I actually did that on the FE, so this would have possibly been believable?

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  12. #1062
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    shoulda smelled that one a mile away but yes, i took bait, figured you replaced it with an XRE300 for stunt duty in LA traffic.

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  13. #1063

    Re: street legal 2-strokes

    did it smell like Castor 927

    pfft...lemme find an XRE300 and see what I can do

    got a buddy leaving CA for work, so I joined him for his local spot ride as a farewell



    honestly, it reminded me of 90's Massachusetts - the undeveloped land next to the (school, shopping center, etc.) was a local trail riding spot...illegal, but tolerated



    trash here and there





    he told me local kids come out in groups of dirt bikes/pit bikes to ride...he's even seen SxS's out here





    AREA: It would be cool if I had something this 10 mins from home...while the whole space is only 5 miles long/10-15 mins from end-to-end, you could get enough practice to get comfortable on a bike and build your skills. Excellent proving grounds for people that live local. The IE (inland empire) part of SoCal is moto country...this is where all the "bro's" live, flat brimmed hats and Fox t-shirts. I walked into a Mexican restaurant to grab a burrito on my way out and the other 2 patrons had a Malcolm Smith Motorsports T-shirt on, and I knew they were trying to figure out who owned the plated 2-stroke outside. Cool place if you're into dirt bikes, all dirt bikes, culturally dirt bikes, and don't like the crowds or expensive-ass bougee coastal living. But it's *hot as F* to live out there...I guess they don't care, and it's cheaper to live out there anyways. No thanks...I'll visit 3-4 times/year to ride.

    BIKE: it ripped! still haven't sorted the timing but the seat time felt great on this easier terrain. I was back in the grove wiggling the rear end WOT in 1st/2nd until it straightened out to get into 3rd. The lower weight also made it easier to brake if you overshot a turn. The 690 would lock up the front and send you into the bushes LOL. The yz can be slowed down easier at the limits and steered out of trouble. It was also easier to turn in tighter stuff; you could just adjust your weight over the tank, push down on the bars and get on the gas to get through a turn. Dump the clutch to lay power down in a turn and it grabs and slides you through. The 690 is more about slowing down, neutral throttle, and rolling through berms. Time the throttle correctly and the bike will wheelie in 3rd gear coming over the crest of a hill.

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    Last edited by breakdirt916; 04-07-21 at 07:24 PM.
    FREE $10 UBER CREDIT W' PROMO CODE --> PON41
    1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:

  14. #1064
    Lifer
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    Re: street legal 2-strokes

    Maybe more like 1970's Massachusetts.....

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  15. #1065

    Re: street legal 2-strokes

    ^^ I was born too late to enjoy that

    Central MA had some low key neat spots in the 90's. I heard dirt bikes in the woods behind the middle school (now houses)...Northborough had the sand pit (now a fedex facility)...Westborough had a practice track behind a shopping center...Bellingham had a sand pit (private property/closed)...I heard there was riding near what's now the solomon pond mall...so it's all gone now, AFAIK. I heard there were trails off of Church street, but all I found (on a mountain bike) was a short section of mountain bike trails.



    It's funny talking to SoCal people who complain about riding areas closing down. SoCal still has dozens of options within a 2 hour drive, but they bitch and complain like it's the end of the world...blah blah "we the people need to unite"...blah blah..."I swear I'm gonna move out of this damn state and move to AZ." but they never move. Great place to ride and a lot of fun people to ride with. But terrible politics and ton of lousy/selfish/triggered people too...If you want to achieve true zen and enjoy it without going crazy, stay out of the exhausting politics and just focus on the riding.

    meanwhile, 7:30pm sunsets mean wrench time after work

    motion pro tool + impact driver got the flywheel nut off



    interesting

    the reddish coil on the upper right is my lighting coil. It's an entirely separate coil than the bike's ignition coil. I guess that's a good thing so if the aftermarket light piece fails, it doesn't kill the bike from running.

    no signs of overheating on the coil

    I guess a low wattage coil isn't such a bad thing. Less is more.

    I also rode the streets last night w' the baja designs light on low (4% power)...and it was just enough light to ride around town with *plenty* of juice left over for the LED brake/tail/turn signals at idle. Flip to high beam when I'm solo/off road for the full blast.

    Very happy with this baja designs setup...wish I did it years ago!

    so for the timing: the bike has a stationary stator plate. Loosen the two bolts (WHICH I AM SO AFRAID OF STRIPPING THE THREADS), twist the plate, and re-tighten the plate. Use a dial gauge to figure out where top dead center is.

    I just looked at the wear marks on the stator plate and moved the plate in that direction (counter clockwise)



    detonating still present...so either gotta move it more, or try the other direction.

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    Last edited by breakdirt916; 04-12-21 at 11:39 PM.
    FREE $10 UBER CREDIT W' PROMO CODE --> PON41
    1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:

  16. #1066
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    super interested to see where you end up with timing edits ... from a quick search, it seems you have to use the dial gauge to do this accurately.

    did i already ask if you tried a tank of 50/50 pump/race gas for the hell of it? i think the timing studies are smart, was just curious because i read often how crappy Cali fuel is.

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  17. #1067

    Re: street legal 2-strokes

    so, uh, I think I "fixed" it



    I moved the stator plate in the opposite direction, and detonation gone!

    so now a couple things are obvious on pavement: the timing retard/woods port do make the top end of the power curve flatten out

    time to test it in the dirt and see if I want to advance the timing just a wee bit more, or just leave it as-is

    next stop: flywheel weight, then smart carb!

    these edits are really to see how much easier I can setup the bike for "dirt bike" rides on trails:
    -woods port
    -13/49 gearing (stock was 15/48)
    -flywheel weight
    -smart carb
    -trail valving in shocks/forks...set pre-load and clickers (maybe try the DeVol linkage)
    -FMF Gnarly pipe (discontinued...would have to source used...I have an ebay auto-search to find one)
    -Rox risers offset bar risers

    I also was considering putting the 2 gallon tank back on, as dirt bike rides are typically just 2-3 hours or under 30 miles

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    Last edited by breakdirt916; 04-26-21 at 07:38 PM.
    FREE $10 UBER CREDIT W' PROMO CODE --> PON41
    1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:

  18. #1068

    Re: street legal 2-strokes

    watching youtube channels are expensive...

    makes ya wanna throw money at setting up your bike

    saw a guy w' a '97 YZ250 w' a Lectron + Gnarly, and he described it as smooth and more low end. Got me itchin.

    so googling revealed:
    -the FMF Fatty pipe is for MX/rev it out
    -the FMF Gnarly pipe is better for trails/low end, and thicker metal
    -the FMF Burly pipe is the same as the Gnarly, but FMF got in trouble and changed the name
    -the FMF Gold series is just a shiny hassle free nickel plating

    There's a rough used Burly for sale for $295 shipped....

    and a better condition Gnarly for $230 shipped...it's been there for months.

    I offered $100 and they countered with $220 shipped

    nvm...will go back to just adding the mods I already have for now

    also Matt's off-road recovery is a fantastic youtube channel

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    Last edited by breakdirt916; 05-15-21 at 12:24 AM.
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  19. #1069
    Lifer typeone's Avatar
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    Re: street legal 2-strokes

    the Fatty and Gnarly might be the same shape but just different construction. not sure if FMF does that for all bikes, but you see the 'Gnarly is better for low end' comments all the time but when actually compared side-by-side, the shapes are the same.

    outside of expansion chamber shapes, you can also mess with the length of your silencer for changes in power delivery. shorter will improve low end response ... i bet most of the 'smooth' the '97 YZ guy experienced was from the Lectron, they are known to mellow out the power band.

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  20. #1070

    Re: street legal 2-strokes

    omg

    @KURLON - DO WE NEED TO BUY THIS KIT!??!



    https://www.ebay.com/itm/23400522684...4a50%7Ciid%3A1

    It's a used long rod kit

    *background*: the hot setup in the 90's was a '94 cylinder + 89 rod (5mm longer rod) w' a spacer plate & longer linkage/cylinder studs. Spends more time in TDC and helps with power overall, maybe more bottom end depending on the porting and ignition timing

    the spacer plate and longer linkage are unobtanium

    but I literally *just* split the cases and rebuilt my motor. I don't need a bottom end anytime soon...and I don't an extra cylinder + power valves

    maybe I could buy the whole thing and sell of the cylinder and power valves

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    Last edited by breakdirt916; 05-20-21 at 03:11 PM.
    FREE $10 UBER CREDIT W' PROMO CODE --> PON41
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  21. #1071

    Re: street legal 2-strokes

    wow, almost 2 weeks since I've ridden it!

    we're now seeing adverse reactions on pediatric patients, the pfizer shot, once involving paramedics riding to get away helps clear the mind



    buddy wanted to start riding dirt before getting a GS, so I took him to some flat roads to get some practice

    and man...after a couple months on the 690, the YZ250 feels RATCHET

    low rpm's feel underpowered/lazy, power delivery is so jerky, getting on the pipe hits weird, bike shakes a lot, rider compartment feels cramped, controls feel all crooked and in the wrong spot, brakes are not strong, frame feels like it's twisting....yikes! sketchy ass bike

    it took a little bit of getting used to...but man do I need to sort this thing out. Rox risers w' new bars, thicker pegs, tall seat foam, 2 gallon tank, lectron or smartcarb, re-position all the controls, flywheel weight.



    random crew of sumo's rolled up on us. Just some guys in their 20's out straight mobbin. The 701 dude works at Rottweiler.

    YZ definitely started easier when fired up on back to back days. She likes to be ridden often.

    Ironically even w' the retarded timing, I still think I have a little detonation.

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    Last edited by breakdirt916; 06-07-21 at 05:51 PM.
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  22. #1072
    Lifer Kurlon's Avatar
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    Re: street legal 2-strokes

    Quote Originally Posted by breakdirt916 View Post
    @KURLON - DO WE NEED TO BUY THIS KIT!??!
    If the cylinder wasn't sleeved I'd jump. As it is, bit pricy. The hard to get parts are the longer pull rod for the powervalve, and the spacer plate, but that spacer plate is an easy piece to get laser cut these days. The pull rod can be lengthened if you have a friend who is good with tig, the longer rod is just an order from ProX/etc. Tempting, might provide a bit more snap to my 292? Sadly budget is tied up at the moment, gotta see how the 500 does.

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  23. #1073

    Re: street legal 2-strokes

    it's still for sale, and now there's a make offer option

    and AMC went up to $58/share

    any idea what kind of offer I could make? $250 and wait for a counter offer?

    I wouldn't put this kit in; just keep it for the next time I do a rebuild

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  24. #1074
    Lifer Kurlon's Avatar
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    Re: street legal 2-strokes

    Asking $750 shipped, no way $250 will get it. If it's like most ebay sales with offer options, I'm betting whatever you offer he'll counter with $675 plus shipping.

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  25. #1075

    Re: street legal 2-strokes



    And it won’t start

    Power felt a little down (bike felt 10-15% “lazier”) the last 3-4 rides or so...but felt consistent. No worry some trends...bike would still start, sometime 2-3 kicks, sometimes more.

    Now compression is pretty low when kicking over.

    It probably needs a top end; but why?

    I have gone 2-3 years on a top end flogging on pavement.

    Was it the 80:1 Saber? The detonation?

    If my top end went out so soon, is my crank not far behind?

    Should I bring it back to the engine builder who did it last and ask them for a tear down/inspection?

    Tear down myself and inspect?

    Buy and install the long rod?

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    Last edited by breakdirt916; 06-20-21 at 04:43 PM.

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