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Finished last year, had a few issues. Finally made a full pass in April, HAHA Still having lots of trouble with the GEMS and a surging issue, and seems to go real lean at WOT may be at the limit of my injectors and fuel pump. Can anyone recommend a performance shop in the northeast that...

the mpi valve 10# spring and 3 turns in.

Still has a real bad stumble just off vacumm transistion to boost. goes way rich and wants to stall. impossible to drive slow on the trail or around the house. bucking and pukking. nothing on the gems seems to help. ANY IDEAS??? Season really getting shorter... thanks.

Put a strap with a turnbuckle. Hope fully thats it. Would like a better looking option tho...

Tried 4 damn times! cut the spacers on the clamps in half and cleaned everything with carb cleaner. blow off valve seems to be working. I can here it. Any ideas???

thanks. i will try it. the engine seems to go super fat just off idle to bout 5000 rpm. wants to stumble and stall

I have it set at 8 I believe. Im at 1600 ft

Stock compression. Race fuel.

dont even know what that is....

What about the bad low end surging and stumbling. the engine actually stalls!

Its the MPI I believe its got a 10# spring in it I backed it all the way off after blowing the intercooler off for the second time. Supposed to be 16#'s or so but havent even gotten close to a full throttle pass...

All installed first ride and has a bad low end sputter and surge. Had the error code for TORS so I jumped it out. Lost the code but the surging was still present. Very hard to ride on the trail, surging and sputtering just off idle and at low speeds. Seemed rich on the A/F also. Finally got...

Running straight fuel and have experienced the nightmares of cold starting with my past 2 stroke outlaw sleds. Was thinking of just tossing an electric heating blanket over the engine compartment for an hour of so before I try to start it. Sounds silly but??? Was told that an inline coolant...

Isnt the plug from mpi a filter? seems very restrictive. do they want that resistance? doesnt seem right.

Is that a direct swap out with the in tank pump? does the stock relay work?

Thanks robbie. Is that the stock walbro in tank pump? What elevation?

Thanks for the input. I always have the fuel araound i like the the way the stock compression feels on the bottom end. Will adding an inline pump along with the stock pump inside the tank lead to too much fuel pressure???

any help???

Please assist a first time apex 4 stroke and first time blower install. targeting 14/15#s on race fuel with stock injectors and and just adding a msd in line pump in addition to the stock in tank pump with stock regulator and stock compression. Will this be enough fuel? what octane...

I'm trying to use an auto meter gauge and sender. they don't have a 1" sending unit only 3/4 and 1 1/4. Is the 1" in id? will the 1.25 work? any ideas???