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I can't tell a difference between a modded predator 212 and stock... is that possible? what kind of gains am I supposed to be seeing with intake, 140 tube, stock jet took out the back firing and hi flo exhaust... my mph stock was 40.65... after mods I'm running 39.76

new intake came in

thanks for the info...

that is still the stock spark... what is a good aftermarket spark plug?

I had a .37 jet in it and I noticed the back fire so I went don't to the .36 jet... if it still back fires after the new intake I throw the stock jet on top of the 140 etube and see how that goes...

I didn't get the back fire till I rejetted... I hoping it's the air fuel mixture because I'm still running stock intake... my new intake will be in the mail today...

What would the Rev limiter do?

here's the plug

I was told if you add a high flo intake and a high flo exhaust you need to rejetted the carb to keep the air fuel mixture correct

nothing... that's it I swear... I just removed the governor just tonight but it did it before... right after I rejetted the carb. I hoping it's just the air fuel mixture but I'm not sure.... exhaust, .36 jet and 140 etube... runs good at half throttle but back fires at full throttle

predator 212 with .36 jet, 140 etube, and exhaust... I've lost 5 mph at my top end and back fires like crazy at full throttle... will the high flo intake take care it? if not what is the cause? at the top end of throttle it feels like it still has more to go but like I said starts back firing...

I've tried to make sense of the ratios but it seems like french to me...

I'm not to sure what size tire to use... I have an intake, been rejetted, and exhaust... 10 tooth clutch and 54 tooth sprocket... what is the ideal size tire I can use without burning up the clutch but have a good top end speed?

intake is coming in the mail... just waiting on it to come in... 54 tooth sprocket? I know it's not a 60

I have a thunder cart and would like to know how to get a let more out of it... how much will tire size effect speed? how much bigger should I go? I'm at 13x5 on the rear...

does tire size affect speed for rear tires?

would tires size make any difference on speed?

gotcha... thanks a bunch and will check back in later

easy that a easy removal? do I need to replace flywheel?

governor has been disconnected... I got the tires from harbor freight... 1 wheel drive