yamahaman244 Posted April 14, 2018 Report Share Posted April 14, 2018 (edited) Hey everyone I recently sent my motor out to Kevin at hjr racing. Kevin was a stand up guy fast turn around and answered all my questions I had about the process. I had him dune port my cylinders, new top end, true and welded crank reeds, new clutch, shift star, and few other things. Took it for a ride the other day thing rips good. Bike is stock stroke running stock carbs and pods along with t5s. Kevin said it would be a good runner which it seems I'm curious to what else I could do to get a little more out of my port job. Cpi pipes? Timing plate? Would bigger carbs help? Also considering a cool head with domes to run half and half fuel. Edited April 14, 2018 by yamahaman244 Quote Link to comment Share on other sites More sharing options...
BlackandYellowBanshee Posted April 15, 2018 Report Share Posted April 15, 2018 Pipes will benefit you greatly. A timing plate would be another good idea. Cool head is a good idea. I'd also invest in a dyno session and get your jetting spot on. You would be amazed by what kind of power that can be found with a properly tuned motor. Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted April 15, 2018 Report Share Posted April 15, 2018 Don't forget to put some $$$ on suspension...Envoyé de mon SM-G935W8 en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
Burt Reynolds Posted April 16, 2018 Report Share Posted April 16, 2018 The best pipes would be those that are matched to your port timing. I would ask the builder which pipes he suggests for your port job. Putting on the wrong pipes will actually cost you power in some of the rpm range. Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted April 16, 2018 Report Share Posted April 16, 2018 4 hours ago, Burt Reynolds said: The best pipes would be those that are matched to your port timing. I would ask the builder which pipes he suggests for your port job. Putting on the wrong pipes will actually cost you power in some of the rpm range. I have experienced this before. timing plate, domes and pipes and you will notice a big difference. You could run race fuel with more compression and timing since your crank is welded now Quote Link to comment Share on other sites More sharing options...
yamahaman244 Posted April 25, 2018 Author Report Share Posted April 25, 2018 Thanks guys for the advise Kevin said it run good with t5s. Guess my question is if you think cpi pipes will pull better up top then my t5s. Are they worth the money? Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted April 25, 2018 Report Share Posted April 25, 2018 8 minutes ago, yamahaman244 said: Thanks guys for the advise Kevin said it run good with t5s. Guess my question is if you think cpi pipes will pull better up top then my t5s. Are they worth the money? they will without a doubt Quote Link to comment Share on other sites More sharing options...
yamahaman244 Posted April 25, 2018 Author Report Share Posted April 25, 2018 (edited) That’s my biggest question if the cpis are worth the money. I feel like the port job would really show with a better top end pulling pipe like the cpis. Just dont wanna dish out 400-500 bucks on a good set if I won’t see much difference.Sense the dune port is mostly topend port Edited April 25, 2018 by yamahaman244 Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted April 25, 2018 Report Share Posted April 25, 2018 (edited) imo since you just said you dont have a timing plate or cool head I would do those mods first and see how you like the difference. Raise the compression and add some timing you will feel it, then decide on the pipes. That kinda shoulda been done any ways haha Edited April 25, 2018 by Ayesully810 Quote Link to comment Share on other sites More sharing options...
yamahaman244 Posted April 25, 2018 Author Report Share Posted April 25, 2018 Ya I wish I would have, just didn’t have the extra cash at the time, damn lay off season. How hard are those timing plates to put on and get going? As far as the coolhead what size domes? Quote Link to comment Share on other sites More sharing options...
Ayesully810 Posted April 25, 2018 Report Share Posted April 25, 2018 (edited) 3 minutes ago, yamahaman244 said: Ya I wish I would have, just didn’t have the extra cash at the time, damn lay off season. How hard are those timing plates to put on and get going? As far as the coolhead what size domes? ask kevin about domes since he did your stuff. he can just cut you a set probably 23 or 22 ccs timing plate is easy. take fly wheel off, removed old timing plate, mount stator on new plate. put back on, put fly wheel back on. done Edited April 25, 2018 by Ayesully810 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.