Seems like a leaky fuel injector to me

 

Just checked injectors can’t see anything leaking.

 

Now it just backfires won’t start.

 

spark arrestor clean

 

Brand new not even 10 miles on them

 

Have you checked the compression


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Some backfires are caused by too lean of a condition. Usually this is the fuel pump but you stated you replace it. Have you since tested that it maintains pressure? The other thing to check for is leaks around the throttle body, head gasket, or exhaust manifold. What do the plugs look like? Are they white? Are they wet?

 

Spark plug wires on backwards ?

 

Check TSP adjustment.

 

My next thing is going to check plugs and compression.If that checks out I guess I will move on to the TPS. I’ll post what i find

 

Okay so plugs are good good spark and colour,compression is 155 lbs a side. So what is the easiest way to test TPS can you do it on the bike Or do i need buy a tester.The search is not very helpful.

 

I check and adjust mine on the machine. I just tapped into the two wires (it has 3, I can't remember which colors you need, but there's threads about it on here) with pigtails ending in a butt splice. My volt meter has simple prong ends on the leads, and I slide those in the other end of the butt splice and lightly crimp to hold in place. Makes it pretty easy so you can adjust if needed while watching the voltage. I can't remember the correct voltage either but .739 at idle rings a bell. Idle being 1150-1200.

 

TPS Ajdastment

hi there, do any one know how to Adjset the TPS for RZR :popcorn:

www.rzrforums.net

Some good info here