I have a 07 450 sp, It is bogging bad up hills and sometimes when going in a tight circle. And i seem to have lost at the least 10 mph at top speed? Any ideas or tips or anything! Thank you in advance

 

have you burned the belt, could be the secondary clutch buttons hanging up and worn out.

 

Just put new belt on cpl days b4 this happened! Got buttons have not put them in yet. Thinking carb needs a cleaning and put buttons in. Hate working on this thing lol just want to ride. Next yr or sooner i am going 2 trade her in on an Outlaw or the alike. Think i am just to aggresive of a rider for the SP

 

Check vent hoses for kinks / blockage.

 

MNpinetree -

When I cleaned the carb and put in a new plug, WOW! She screams, we had it cutting it out here and there (thought the wife just didn't know how to drive it, LOL) then after sitting, spitting, spluttering and kunking out, would NOT start.

I tell ya when you clean the carb and change the plug, it does great, should do each season as with OIL Changes IMO!

R'

 

I had a similar problem. When we checked the plug for spark it was arcing off the side. Cut 1/2 off the plug wire put it back in the cap end and it runs fine.