mpd579 Posted September 16, 2012 Report Share Posted September 16, 2012 OK if anybody read my post a few weeks back I switched to 110 and my bike slowed down. After all kinds of work and headache meds here is what I've got........... Kevin cut me some domes (tried 19cc and 20cc) My compression was up around 190. He said based on everything he wanted to do some different porting (had his Hardcore MX 4 mil port) so I send the cylinders back to him. He opened the exhaust up some more and did a little work on the intake. Put it back together and it runs just like it did on pump gas with 23 cc domes. (remember is was slower on 110 before the new port work) My thinking is I'm justing making all the power I can get on my setup. Right or Wrong? Would it be worth my time to take my T5's off and try a set of CPI's? Any other ideas? Mods are in my sig My jetting is right on IMO 155 main 42 pilot and on the 2nd clip squish was .042 ran the timing at +6 +4 and 0 didn't make a difference tried 110 from 3 places mixed a little 93 in once and ran some 100LL It runs its best on the 110 I'm running the stock gearing with 20 tires I did try a 15 tooth front just for the hell of it......might run a little better from a 2nd and 3rd gear roll but not enough to make up for what it would lose off the line vs the 14 t I swapped my old old Rad valves out for a set of VForce 4's Flywheel is good BTW sidenote Kevin (HJR) has broken his neck helping me. Calls me back after hours, he loaned me a set of the domes to see which worked better, did my new port work the next day after he got it, exc. Needless to say I'm going to send him a Christmas gift. I've not talked to him since I did my test and tune tonight to get his thoughts. Saving that til Monday. LOL Quote Link to comment Share on other sites More sharing options...
bluebanshee98 Posted September 16, 2012 Report Share Posted September 16, 2012 (edited) i got his dune port on a 4 mil and when i switched pipes from fmfs to shearers i liked how the bike performed better.any kind of drag pipe would of been better then what i was running with my port. it had more top end powerband pull which is what i wanted so it depends on what you want the bike to do. if i had the $ to do another build right now i would of def gone 10mil or higher and went with a different cylinder. i love my ported 4 mil stock cylinder dont get me wrong but the addiction takes over and i want more power did you try a lower compression for shits and giggles to see how it performed? ( higher cc dome) im kind of surprised though that when you went with higher compression and race gas that it slowed down. maybe too much pressure working against the crank with the port job? idk kinda talking out my ass here after a long night im . someone else can chime in on here. im sure you would like a different pipe though. its not gonna be as crazy of a difference as like when you got it ported but a different pipe will give it a different feel. kev will get you the best answer but just my 2 cents. Edited September 16, 2012 by bluebanshee98 Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted September 16, 2012 Report Share Posted September 16, 2012 I think your jetting sounds lean. What is your elevation? Which carbs exactly? Just run the 110 straight. Don't mix it. Leave the timing at +4. Pipes are definitely holding you back. You're probably down 5-8 HP from what you'd be with CPI, Sniper, Shearer or Rockets. Quote Link to comment Share on other sites More sharing options...
mpd579 Posted September 17, 2012 Author Report Share Posted September 17, 2012 Keihin 34mm Pj's is all Ive ever know these carbs by? Our elevation is around 1500 feet & yes that is why it was slower before simple terms (that all I understand) it couldn't get all the exhaust out Gonna borrow a set of CPI's this week and try them out Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted September 17, 2012 Report Share Posted September 17, 2012 34PJ are a very temperamental carb. The jetting has to be spot on in them or the motor won't run right. I think you'd benefit from running some 35PWK which are much more forgiving. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
guns4children Posted September 17, 2012 Report Share Posted September 17, 2012 Like goat lord said. Sell the 34 s to another sucker and start over with 35 pwks Quote Link to comment Share on other sites More sharing options...
KEVSWS6 Posted September 18, 2012 Report Share Posted September 18, 2012 Don’t sell it. It will make so much more power with Shearer or CPI's with some 35PWK's you won’t believe it. Quote Link to comment Share on other sites More sharing options...
mpd579 Posted September 20, 2012 Author Report Share Posted September 20, 2012 NO change with CPI pipes bike feels like it runs better in 4th gear plus than it does in 1-3?? May trade it on a 350 Warrior w electric start LOL Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted September 20, 2012 Report Share Posted September 20, 2012 I'm telling you, it's the carbs. PJ's are a pain in the ass to tune. They have to be perfect. One main or pilot size off will make it run like shit. Ditch the carbs. Get 35PWK. Quote Link to comment Share on other sites More sharing options...
wfobasheeboy Posted September 20, 2012 Report Share Posted September 20, 2012 Don’t sell it. It will make so much more power with Shearer or CPI's with some 35PWK's you won’t believe it. I would also say CARBS. try 35PWK's Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted September 20, 2012 Report Share Posted September 20, 2012 loco is rite on those carbs blow Quote Link to comment Share on other sites More sharing options...
mpd579 Posted September 21, 2012 Author Report Share Posted September 21, 2012 Look for a used set of pwk right now Quote Link to comment Share on other sites More sharing options...
mpd579 Posted September 21, 2012 Author Report Share Posted September 21, 2012 Got a set on the way Should the jetting be close to the same w the new carbs? Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted September 21, 2012 Report Share Posted September 21, 2012 158-162 main. 45 or 48 pilot. It will vary with temp and altitude. Quote Link to comment Share on other sites More sharing options...
mpd579 Posted September 21, 2012 Author Report Share Posted September 21, 2012 Thanks a lot Ill bring beer 2 the camp lol Quote Link to comment Share on other sites More sharing options...
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