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mopar1rules

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About mopar1rules

  • Birthday 06/18/1984

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    Male
  • Location
    Wisconsin

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  • My Banshee (optional)
    '98 shee w/fmf fatty's, cylinders ported, case ported, stock carbs bored to 27.1mm, white bros. boost bottle, cool head w/18cc domes, fmf power core II silencers, bored .050" over, uni air filter, carbon tech reeds, pro taper bars w/custom risers, nerf bars, throttle over-ride eliminator kit.

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  1. Agreed....i ran a stock head that i milled .030" off on my stock stroke setup and i run on a stock head on my 4mil too. It's cut for the additional stroke of course. I love how it never leaks like my "poor design" cool head did. Don't know why people don't like the stock head. Just because its a stock part, doesn't make it bad. And just because a part is aftermarket, doesn't make it good or better than a OEM part. To the original poster, you could have your stock head cut for cheap and pick up some power.
  2. Looking to buy 2 vitos .020" thick base gaskets. Need 1 for sure. Please pm me.
  3. Got a OEM crank that needs to be rebuilt
  4. The only thing I like about the single ring piston is that you can add a boost port to the piston where as a dual ring piston has no room to properly place a boost port. I thought about modifying a 68X54 cheetah into a 68X58 but thought the port timings would get a little too wild with the transfers.
  5. I never really had a problem adjusting rotax power valves with spring changes. im o e of those guys that can't have enough power. Right now I want a NOTICEABLE increase in power from my 4mil ported setup. So, the cubs eat up pistons but the cheetahs don't?? If this is true, its probably from the large intake window area?? Yeah the best form of a actuating a power valve, is with a cable from a servo motor, that gets its signal from a TPS and CDI box. That way is so consistent, but a little more complex to hookup. I guess I will have to look back into the cheetahs then, seeing as some others like how strong their motors are. I wish the cheetahs with power valves had a 68 X 58 option on the CP industries website.
  6. Yeah I guess. The trails I ride are open and have many long straights. Which is why I didn't think it would be an issue with the cubs high exhaust timing and slight lack of low end.
  7. So, you use a keihin main jet to adjust how and when the power valves open? Sounds like a shitty setup to me. I assumed they worked like the exhaust valves found on the Polaris and Ski-doo sleds. I think I will stick to the cub and give it high comp for better bottom end.
  8. That's kinda what I was thinking with the stock cylinders and big bore sleeves...... nor being able to flow properly for 68mm+ bore sizes. I feel the transfer runners on the stock cylinders aren't up to the challenge. I guess I will stray from the OEM cylinder big bore idea then. I thought I remember reading somewhere that the cheetah cubs with PV's were expensive to setup right and dial in, to make power and that the non PV cubs made hp more easily??? Any truth to that? I like the idea of the power valve, so I can have low end and top end.
  9. Do the cheetahs with power valves have the same port timings as the cubs? Or do they have higher exhaust port timings, due to them having power valves? The reason im not really looking into serval cylinders, is because I thought I read on here that they dont take well to high compression and some of the higher rpm pipes?? I thought people weren't able to get them to run like ported cubs??
  10. Stock stroke port? Send pics to 920 905 0969
  11. Don't know which cylinders I should go with for trail riding and playing around in fields etc. Cheetah cub 421 (68mm bore +4mil stroke), cheetah with power valves, or stock cylinders with big bore sleeves. I currently have stock cylinders that are ported for the 4mil with 4mil long rod crank, 15:1 comp, vforce2 reeds, timing +4, r2 pipes, bored stock carbs, airbox modded, and case ported. Just looking for some more hp. I guess the cheetah with power valves use cr250 reeds while the cub uses the stock reeds. Which setups have you guys used and had good luck with? Thanks.
  12. I will add that I as well have been having good luck with the vitos 4mil long rod crank and that's what I would stick to.
  13. And make sure the new domes don't have an abnormally wide squish band. Don't need anything over 55-60% on pump gas imo.
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