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14.5 gram/YPY spring on MPI Charger/roller

jason22

Pro
Joined
Feb 28, 2014
Messages
182
Location
Newboro Ontario Canada
Country
Canada
Snowmobile
Yamaha Nytro
hi guys

Been searching the post and haven't run across it yet.

Has anyone been running a MPI Supercharger with the 14.5 gram roller and the YPY Spring?
Any thoughts and how does it act?
Does the charger behave with 14.5 rollers and YPY spring

The charger was on sled when I bought it and awesome power love it but can't stand it at low speeds too jerky.

Bought the rollers at $50 a roller Canadian
(Made of gold up here. Lol)
Spring was $34
Thanks
 

Do you know what primary spring is in it now? The 14.5mm rollers will lower the overall rpm.
 
Hi hyprst

I think the primary spring is stock.
From all the positive reviews I'm accually dropping sled of mechanics and having the 14,5 rolllers and the YPY spring installed today while there's no snow :(
 


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