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Matt
Matt, Engineer
Category: Motorcycle
Satisfied Customers: 20785
Experience:  Honors degree in Mechanical Engineering, worked 8 years as a Formula 1 engine engineer.
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Got a rzr 900 that loses power @ 5000rpm and drops to @

Customer Question

got a rzr 900 that loses power @ 5000rpm and drops to @ 4000rpm
Submitted: 16 days ago.
Category: Motorcycle
Customer: replied 16 days ago.
got a 2015 polaris rzr 900 that loses power @ 5000rpm and drops to @ 4000rpm in high and low.... plugs and fuel pressure is good.... what's the deal??
Expert:  Matt replied 16 days ago.

hello

has the vehicle been modified in any way?

are you running the original size tyres?

has the transmission oil been recently changed?

Customer: replied 16 days ago.
No mods and tranny oil was changed this past summer
Customer: replied 16 days ago.
Has plenty of power early then at 5k rpm it loses power... drops and stays at 4K even with full pedal... doesn't sputter or mis or anything else... like it's choking out...
Expert:  Matt replied 15 days ago.

hello

in that case Id say its likely to be an electrical / electronic issue

I'd start by checking the condition of the engine earth connections to the battery and the connections to the CDI module

if this all looks OK then I'd suspect that the CDI module is faulty

Customer: replied 15 days ago.
it was a bad seat belt switch..... LOL thanks!!