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WELL THEN.
Cracked into the DR and not what I expected.
No smashed valves or piston. Rockers/cams are rough. Timing chain is very loose and timing way off. Probably skipped multiple times, first killing all compression leaving me stranded, then finally opening valves enough at TDC it locked up.
Have a few spare rockers/cams so I'm feeling *slightly* optimistic I can get away with new rings/hone/cam/rockers/timing chain/cleaning & maybe valves (although they look untouched I haven't inspected the seats).
Just starting to go over things though.
The amount of carbon & sludge is insane. Not too long before it died I almost completely sunk the bike. Dumped a *lot* of mud & water from the air box and had to kick it for ages to get running again. The intake valves have "fresher" looking smears of goop built up on top of the typical carbon deposits, so it probably took a few nice gulps of dirt & water...
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05GSXR75005SV65090DR350
Eek...this is why I run 2 strokes...you got this tho
Last edited by breakdirt916; 03-12-19 at 09:53 AM.
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1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:
The KTM is pretty much my preferred bike for the woods now but keeping the DRs around for dual sport/street/camping.
I 100% blame myself for the problems. Timing chain was nearing the end of its limits when I did the rebuild but costs were adding up fast. Combined with losing oil and running it pretty low a few times I'm still amazed it held out this long!
Might actually be for the best, if I didn't have this project ahead of me god knows what I'd be getting into.. already been scouring CL for a blown up GSXR to play with. :0
05GSXR75005SV65090DR350
Ha, minus the substantive knowledge and experience...
My heart says yes but my brain says my wife will kill me if a 5th dirt bike shows up here lol
Sort of open to a little 250 for my better half, definitely open to a 04/05 GSXR 750/1000 project bike. Or maybe ZX10/R1/CBR1000... at this point I'll need to sell a bike or two before getting into the next big project.
05GSXR75005SV65090DR350
Figured I’d get the ball rolling: new timing chain, crank cover & head gaskets on order. Also a new drivechain & sprocket which are due.
Have got a used cam & rockers in acceptable condition.
Cylinder walls & piston have no noticeable damage or significant wear. With some luck I might keep it barebones and have a running bike again for not much over $100. Further inspection and cleaning while I wait for parts will tell the whole story though.
05GSXR75005SV65090DR350
With the short run time, I'm curious how that piston and combustion chamber got THAT carbon'd up? Any chance it was burning oil?
"$100 to get going again" is the way dirt bikes shoud be....cheap fun
which ktm do you have?
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1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:
Not ruling it out but still unsure. This was a little under 1.5 years of runtime. A lot of the crap in there is just flaking/falling off and somewhat soft, which I'm attributing possibly to contamination from when I sunk it. Beneath that is a much harder typical layer of carbon deposit. Valve seals, rings, and head gasket were all new on rebuild.
05GSXR75005SV65090DR350
haha, yeah dirt bike technology has gotten exponentially better...a '19 will even blow the '06 out of the water
the XC-W torque will rival that of older 4 strokes to make it such a fun bike to ride
all things considered, the dr still has its place as relatively simple, 6 speed, inexpensive woodsy toy.
Last edited by breakdirt916; 03-12-19 at 06:25 PM.
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1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke:
Well I haven't ridden any newer ones, but the weight difference was the most obvious difference. Shoving that DR through rock piles was a hell of a good workout though! One slight advantage of the weight is the DR definitely has some inertia. If you can wrangle it and keep the momentum up that beast will go through quite a bit of hard stuff.
The 250 torque is awesome, and I still have lots of dialing in to do overall. Pretty much just replaced a bunch of wear items (it was ridden hard in enduro before I got my hands on it for a nifty $1,300) - rode every chance I could and never messed with the powervalves, banged up exhaust, or touched the suspension except to dial the sag way up.
05GSXR75005SV65090DR350
That looks fun. The Xtrainer has caught my eye due to the size. I’d love to play with a big bore & flywheel weight on the CR85 just to see what it could tackle but that’s $$ I can’t spend on such silliness. Really fun being on a bike that doesn’t have 100lbs on me!
05GSXR75005SV65090DR350
I almost bought one of those, maybe 1.5 to 2 years ago. Wasn't your old one though. Was still in 125 trim, but had the 144 kit with it. The one you built was drool worthy.
Ended up with a 200xcw last fall, which is suiting me well so far. Looking forward to putting some hours on this year.
Beta 200RR
Beta 200RR
If I could get the wr144 plated in CA...
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1994 Yamaha YZ250 CA Street Legal 2-smoke :smoke: