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TOPIC: Re:Engine mods - high comp pistons, big bore, etc. Forum Tools Post New Topic Show latest posts Rules

#130963 Rayjay (User) Senior Boarder Posts: 236 Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Musky's pic of the 102 cid has intrigued me and I have been batting around the idea of doing an upgrade. I want to ask a few questions of those who have done this as follows: What upgrade work have you done: High compression pistons with or without a re-bore and sleeves; valve springs; head porting, etc? Are you satisfied with the results? Were the costs in time and money worth it? How much did the upgrade cost? Would you do it again? What would you do differently? Thanks, guys   Logged     Last Edit: 2008/10/17 18:48 By Rayjay.   Ray   The administrator has disabled public write access. #130967 ultrastar (User) Keep The Speedometer Side Up Senior Boarder Posts: 307 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Hi Ray I have Yamaha high compreeion pistons,dyna 3000,Nemesis manafold,Dynatek High Performance Coils and I'm very happy with it, just found my last dyno test and my max power was 76.46 and the torque was 107.78 and I was burning rich. I am going with a big bore this winter. trust me she's a ball to ride   Logged     http://s366.photobucket.com/albums/oo105/ultrastar1/   The administrator has disabled public write access. #130999 billjr (User) RIDE LIKE YOUR INVISABLE!!!!!!!!!!! Platinum Boarder Posts: 1130 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   ultrastar wrote: Hi Ray I have Yamaha high compreeion pistons,dyna 3000,Nemesis manafold,Dynatek High Performance Coils and I'm very happy with it, just found my last dyno test and my max power was 76.46 and the torque was 107.78 and I was burning rich. I am going with a big bore this winter. trust me she's a ball to ride What kinda MPGSSS???????????   Logged       The administrator has disabled public write access. #131018 ultrastar (User) Keep The Speedometer Side Up Senior Boarder Posts: 307 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   billjr wrote: ultrastar wrote: Hi Ray I have Yamaha high compreeion pistons,dyna 3000,Nemesis manafold,Dynatek High Performance Coils and I'm very happy with it, just found my last dyno test and my max power was 76.46 and the torque was 107.78 and I was burning rich. I am going with a big bore this winter. trust me she's a ball to ride What kinda MPGSSS??????????? Bill I do ride a little hard and I get about 30 yo 35 MPG   Logged     http://s366.photobucket.com/albums/oo105/ultrastar1/   The administrator has disabled public write access. #131058 Curt (User) Never to old to ride! Platinum Boarder Posts: 3149 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   I am pumping out 75 HP and 97 lbs torque stock bore, BAK, ported stock manifold, Bub Pipes, and Dyna 3000. Seems like a lot of money just for 9 more lbs of torque to me.   Logged     Black Ice is Shinny, Black Ice is Deadly, Ya Wanna Ride My BlackIce?   The administrator has disabled public write access. #131070 ultrastar (User) Keep The Speedometer Side Up Senior Boarder Posts: 307 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Curt wrote: I am pumping out 75 HP and 97 lbs torque stock bore, BAK, ported stock manifold, Bub Pipes, and Dyna 3000. Seems like a lot of money just for 9 more lbs of torque to me. Curt like I said I was burning rich. the tec even said if I had the carbs fuel and air mixture right he would get at the minimum of ten more horse out of her if not more and by the way high compression pistons will only give you about 10 more horses   Logged     Last Edit: 2008/10/17 23:03 By ultrastar.   http://s366.photobucket.com/albums/oo105/ultrastar1/   The administrator has disabled public write access. #131074 Curt (User) Never to old to ride! Platinum Boarder Posts: 3149 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Guess I'll stick with my 36-38 mpg city 46-48 highway at 80+ mph and 87 octane. She goes good enough for me although I did think about having something done if I had to go into it. Bill will tell ya she scoots along really good.   Logged     Black Ice is Shinny, Black Ice is Deadly, Ya Wanna Ride My BlackIce?   The administrator has disabled public write access. #131075 Big Bear (Moderator) All things in moderation! Moderator Posts: 4868 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Bought a Roadliner.............................OK , I'll show myself to the door......... BB   Logged       The administrator has disabled public write access. #131082 javawave (User) Over 16801 good days in a row and counting Platinum Boarder Posts: 3490 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   sometimes its a fine line between HP, gas mileage, running cooler, running hotter and SVS. Kind of a juggling act.   Logged       The administrator has disabled public write access. #131084 javawave (User) Over 16801 good days in a row and counting Platinum Boarder Posts: 3490 Re:Engine mods - high comp pistons, big bore, etc. 2 Months, 3 Weeks ago   Curt wrote: I am pumping out 75 HP and 97 lbs torque stock bore, BAK, ported stock manifold, Bub Pipes, and Dyna 3000. Seems like a lot of money just for 9 more lbs of torque to me. Curt, thats still about 10 HP more than a stock bike. 14% gain is pretty good.   Logged       The administrator has disabled public write access.

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