Sluggish GPR 1200

[Rendog]

Hello everyone , I have a freind that has a 2002 Yami 1200 gpr. The ski has set up since winter. This guy as far as I know, did'nt winterize the thing. He started it up last weekend and the ski runs VERY sluggish. We changed the plugs and noticed the the middle cylinder looks as if its fuel fouled. Someone mentioned that this particular model had issues with the exhaust? Im thinking it may be time for a carb rebuild? What are we looking at as far as difficulty?

[Rendog]

ok, can someone maybe tell me another site where I can get some input?

[RX951]

Hello Rendog, I apologize for any delay on replies. sounds like you need to change the fuel filter and inspect the carb for cleanliness. With it being a 2002, I am sure it may be due. Prolly would not hurt to get rid of that gas and put in fresh fuel too

How many hours are on the craft ?
Do you know if the Catalytic Convertor is still in place ? (Cat Con)

Is the craft all stock ?

I also recommend doing a compression check on the engine to get a baseline of the motor.
http://greenhulk.net/forums/showthre...pression+check


check this site out for some how-to's
http://www.cajundude.com/techpagehome.htm

[Rendog]

Thanks RX, the ski is bone stock, the fuel is certainly old, and the filter could certainly be changed. Is a carb rebuild necessary? Ill get a compression check as soon as I get with the guy.

[Duke]

Old fuel is definately prone to fouling plugs. Try to get it out and install new plugs after that. Please list everything done to the ski and we can diagnose a little better. Sorry for the delay in response, didn't see the post for some reason.

[Rendog]

The ski is straight off the show room STOCK!!!

[porksword]

Old fuel will do it. Also it sounds dumb but I have seen mice build nests in intakes. I pulled the airbox off a friends ATV because he stated it wasnt running right and found two handfulls of dogfood in there that was brought in by mice for storage.

[Rendog]

[Duke]

Also check to see if the powervalves are cycling when you shut the motor off.

[Rendog]

well, we got the ski apart last night and the catcon looks fine, although the reeds in the middle cylinder has a real dark spot in the corner .
I'll take pics and post them. This cylinder was the one that the plug was fuel fouled when we first pulled the plugs! All gas was removed yesterday before we took it apart ! Where to buy carb rebuild kits for a descent price, and the guy wants to know which way to go as fasr as modifications?