Arctic Chat

psu309 · 01-12-2011, 10:17 PM

Took my F7 out for the first time last w/e. Night and day over my old Yamaha. The sled ran great, but I could only pull 7500 max rpm. It ran good up to the 7500 no bog or miss. It is stock other than Boyesen Reeds, Orange Primary Spring, Green Secondary Spring & 78gr Dalton weights. I need some help on some things to look at.
thx!

the grinch · 01-12-2011, 11:51 PM

check your secondary clutch,the moveable sheave bushing ,there known to cause that problem,check the belt deflection,and try a new belt

psu309 · 01-13-2011, 07:23 AM

you confirmed my thoughts on the secondary. Is the deflection spec 1"-1-1/2"? what's the best way to check that? Is the cat belt, the best one to use?

**tiggershark** · 01-13-2011, 07:31 AM

78 gram weights are a tad too heavy for a stock engine.
Those weights go along with a y-pipe upgrade and a stealth pipe, at least that's what I run with my set-up and I pull 7800-7900 rmps .
Stock weights would probably be a better choice (75????)

psu309 · 01-13-2011, 08:01 AM

Yeah, the guy I bought it from had a D&D Y Pipe and pipe mod. I think I will get the D&D Y Pipe and the BMP Pipe Mod. I think I'll be back in the game again after that. I may pull the secondary to look it over. What's the deflection spec and best way to check it?