Hi,

 

Iv recently bought a 2006 Sherco 290 after being out of trials for about 5 years.

 

Was out at the weekend and all was good apart from the bike needing setting up for my riding position etc.

 

After trying some hills on it and it feeling a bit underpowered I thought I would take the carb off and give it a clean. When I took the mud guard off the air filter was totally manky black, I surprised the bike even ran. The airbox was full of watery mud and the intake to the carb was full of grime.

 

I also found it had a Keihin carb fitted, which wasn't advertised. Is this due to being a 290? My last one was a 250.

 

Anyway I cleaned it out and unblocked the jets etc. I also adjusted the float level as fuel was constantly coming out the overflow.

 

Now the bike wont start. I have checked the plug and its getting fuel and there is a spark. So iv set the float level back to what it was and still wont start.

 

Could the bike be getting too much fuel now due to being starved of air before, as to be fair the bike ran pretty good considering the state of the airbox.

 

I should also clarify that the mud and water was not off me as was a totally dry day.

 

Hope someone can help. Not sure what to try next? I di wash the bike off so im wondering if its a week spark caused by water getting into electrics?

Tom

Have a read of this, should help to get your carb properly set up for a start: 

 

http://www.splatshop.co.uk/blog/2012/12/setting-the-float-height-on-the-keihin-pwk-28/

 

That mudguard is designed to fail so you will have to cover the obvious gap between the mudguard and the subframe where all the water and crap gets projected off the rear tyre, either be ingenious and make some sort of flap or just use duct tape!

Also fit some draught excluder between the airbox and the side of the guard where again there is an obvious gap for dirt and water to get in, just sit back and take a proper look and you will see where all the problems are.

 

Definitely worth having a look at the piston if there's gunge in the inlet and give the gearbox and crankcase a proper flush out as well as it's bound to have all sorts in there now!

 

I'm also just a few weeks into 290 ownership and you learn quickly and there will definitely be some more clued up types along soon with their suggestions...

 

Good luck.

 

Mike