SV650S 02 poor acceleration

[BURZA]

I am new to motorcycles. I purchased the bike back in Feb 09. Since then I have logged 4K. I have changed the oil and air filter since getting the bike.

A month ago with all the rain, I rode to work and back while the cage was in for some service. Just after this time, the bike started to have issues starting up with the choke on. It stalls out once the choke is off. I can get the bike to stay running after some warm up time. I put 89 octane in it. I was suggested to use some fuel boost. The bike will run and can get up to 85mph, but it takes foooooor ever. I have not yet had a chance to check the spark plugs as I was hit by the swine flu during those beautiful weekend days. Or am I looking a plugged jets due to the ethanol in the fuel?

I do plan to get to the plugs. I just need to be rid of this flu.

thx

[TheIglu]

Probably have a cylinder not firing. Use some compressed air and blow out the little drain hole that allows water to drain from the cylinder head where the spark plug goes in.

[RandyO]

do a complete tune up service

plugs, clean air filter and sync the carbs

if you still have issues after that, you'll have to pull the carbs & clean em, resync again,

don't waste your money on boost, snake oil addatives or anything higher than 87 octane

[BURZA]

thank you RandyO and Clayton.. I will try these ideas out.

[OreoGaborio]

Yup. Chances are, either the carbs are gummed up or the front spark plug is shorting out. It's relatively common for 1st gen SV's to have the front cylinder go dead after some riding in the rain if enough water gets into the plug hole.

But this may or may not be your problem.

Fire up the bike, let it start to warm up & spit/splash a little water on each header to find out which cylinder isn't firing. If it's the front it's either the plug or the carbs... if it's the rear it's probably the carbs. If they both sizzle then... well, get back to us.

[DuncanMoto]

Wirelessly posted (BlackBerry9000/4.6.0.297 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102 UP.Link/6.3.1.20.06.3.1.20.0)

How long did the bike sit without running?

[Jim]

...gets into the plug hole..

[NobodySpecific]

I lost the front cylinder on my 04 SV this weekend in the rain. Clean out the drain hole for the front plug and use some dielectric grease on the plug and you should be good to go.

[BURZA]

duncanmoto.... the bike had been ridden several days before the rain day. Then I rode it a day or so more afterward. Since then, I have been down with the flu or been swamped by rain and not had a chance to attend to the drain line or test the cyclinder to determine which head is not working.

SV650N... i shall look over my manual to find this drain line and blow the line out.

[OreoGaborio]

Just stumbled upon this article. It might be of some help to ya.
http://www.svrider.com/tips/front_cyl.htm

[Doc]

It's an SV...

[Currently]

It's an SV...

Blasphemy! Burn him at the stake!

[BURZA]

I started up the bike to warm it up. I wanted to test the front cylinder to see if it was getting hot. Upon moments of starting the bike up, smoke started coming out from the front pipe where it connects to the engine block. A thin white wispy smoke. I ran the bike for a minute on full choke and it seemed to rev to the proper level. I then backed off the choke to the minimum level. The bike seemed to idle just fine. All the time it was releasing this thin white smoke from the connection of the pipe to the engine block. There was no smoke coming out from the rear pipe connection. I let the bike warm for about ten minutes. Occasionally revving, lightly. At this ten minute point the bike stalls out. I restart the bike using the choke. Bike starts up again, this time rougher. The bike idles for about a minute then stalls out once more. Any reason why I would be getting this smoke out of the pipe connection to the engine block? Upon the third time starting up the bike, now I am hand revving the bike and the exhaust is sounding like small very short back fires rapidly for short moments correlating to the amount of throttle twist I give. The harder or longer I rev the engine the longer the amount of back fires I get. They are not single loud bursts, but short snaps. I am thinking some water is burning off from the front cylinder. Am I correct?

[The Snowman]

The smoke sounds like it's a bad or blown exhaust gasket. Not a hard fix.

[DuncanMoto]

Wirelessly posted (BlackBerry9000/4.6.0.297 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102 UP.Link/6.3.1.20.0)

I'm thinking you need to pull the front spark plug and post a clear photo of it.

[Sheppo]

Wirelessly posted (BlackBerry9000/4.6.0.297 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102 UP.Link/6.3.1.20.0)

I'm thinking you need to pull the front spark plug and post a clear photo of it.

[SVRACER01]

front spark plug is my guess. pull the plug(s) and change them at least. when you pull the front plug check for moisture. if its wet...thats your problem.

[BURZA]

well it has been some time since my last post. since them i have moved and gone through several holidays. now as the warm riding weather approaches my focus is back to getting this issue resolved.

I have removed the rear spark plug. I know I was to remove the front one. But I am having some issues trying to figure out how to remove the plug. The radiator appears to be in the way. Then moving the radiator out of the way seems harder even. There are some large 1" dia hose lines going out the bottom and back to the engine block. I was going to pull these off until it dawned on me that these lines were likely filled with some fluid. the lines do not seem long enough to let the radiator swing up and away from the spark plug. What is the best way to get the front plug out on this model of bike?

attached please find pix of the rear plug.

PS will the front plug be as deep into the head as the rear? The rear was quite hard to get out of the deep recess it was in.

[Fitz]

Remove the bolts on the radiator and swing it down and forward. There's plenty of room to remove the spark plug without disconnecting the radiator. And yes.. the hole is just as deep.

Fitz

[GixerJockey]

And stop running garbage ass Denso plugs in it...

[The Snowman]

And stop running garbage ass Denso plugs in it...

NGK Iridium IX FTW!

[GixerJockey]

NGK Iridium IX FTW!

Naaa... Iridiums are a waste of money. It's just a long lasting version of a regular NGK spark plug. You're much better off running a CR9EK. the temp range is perfect and the "K" stands for dual electrode. You get a much better spark with the added surface area of the dual electrode as compared to the iridiums. You can go through 4 sets of the EKs and still not be at the cost of the iridiums, while constantly having fresh plugs.

[BURZA]

thank you for the product quality update. I bought the bike with these

garbage ass Denso plugs in it.

I now shall replace all the plugs in the bike since I now know the plugs are

garbage ass.

I very much appreciate the information.

Can the radiator be swung down by removing only the top bolts and leaving the bottom one still attached? Do the side farings have to come completely off or just enough to gain access to the top bolts? and if the side farings have to come off, I suppose the mirrors do as well. Gesh.. all this just to change a spark plug.

A comment on the status of the plugs would be helpful. Are they past their point of usefulness? If these had been NKG, would it be right to put them back into the bike and continue using them?

[GixerJockey]

Like many, I'll be the real issue lies in the front cylinder, not the rear. Can't really give you any more info until you pull that front plug and give us an update.

[OreoGaborio]

thank you for the product quality update. I bought the bike with these *garbage ass Denso plugs in it*

I now shall replace all the plugs in the bike since I now know the plugs are *garbage ass*

I very much appreciate the information.

Haha, I like this guy... he doesn't take Noel's crap