305Shee Posted March 5, 2009 Report Posted March 5, 2009 (edited) Hey guys i have read through allot of topics and searches for about the last few months trying to understand how to make my bike run its best. I am going to start with my Mods: Light Port Work No airbox VF3 Reeds CPi Pipes (SB) 160 Compression maybe more Timing Plate +4 16/40 Gears +4 Swing Arm Now im going to tell you a bit of how the bike runs 1/4 Mile 86 MPH 165 lb rider It is very crisp through all the gears but 6th gear dies out? is it my gearing? i do allot of asphault racing with about 20% trail riding Other details is i Spin all of first but that should be because of my swing arm being extended you guys agree? What can i do to run some higher octane? My plugs look good but i havent done the test as i read in some of the post that others left on the forum im going to do it correctly this weekend and report back. Basically what i want to do is get some more power out of my bike by fine tuning some more before the summer... because over the summer i will be overhauling the bike again. Any input you guys can give me would be appreciated and if i left any information out just ask. Thanks. Edited March 5, 2009 by 305Shee Quote
tony cub Posted March 5, 2009 Report Posted March 5, 2009 (edited) u have any porting???if so,how did it..you will need some type of port work to push those cpis...that can also explain why u dye on 6th.u wold have to shave your head for more compresson to run race fuel and get anything out of it..pm me if you have anymore ?s i'm also in the 305 and can give you a hand.. Edited March 5, 2009 by tony cub Quote
305Shee Posted March 5, 2009 Author Report Posted March 5, 2009 u have any porting???if so,how did it..you will need some type of port work to push those cpis...that can also explain why u dye on 6th.u wold have to shave your head for more compresson to run race fuel and get anything out of it..pm me if you have anymore ?s i'm also in the 305 and can give you a hand.. Well my mods are described up top and i am also 20 over bore size. So yeah i have porting done to my bike and my head is shaved just not sure of the compression... Quote
305Shee Posted March 6, 2009 Author Report Posted March 6, 2009 Well my mods are described up top and i am also 20 over bore size. So yeah i have porting done to my bike and my head is shaved just not sure of the compression... Any BODY? Quote
shee4speed Posted March 6, 2009 Report Posted March 6, 2009 that is huge gearing.maybe try a smaller front. Quote
305Shee Posted March 6, 2009 Author Report Posted March 6, 2009 (edited) that is huge gearing.maybe try a smaller front. I have at home a stock front and a 38 rear... I used the speed calculator and it was telling me that 16/38 gives more MPH but how can i actually tell if it is accurate...is the best thing to do trial and error... is there another way to use the calculator that will be more accurate... These are the calculations....16/40 is my stock config. 17/40 32. 43. 52. 63. 75. 90. 16/40 30. 41. 49. 59. 71. 85. 16/42 28. 39. 47. 56. 68. 81. 16/38 31. 43. 52. 62. 75. 89. 17/38 33. 46. 55. 66. 79. 95. GEAR 1st 2nd 3rd 4th 5th 6th Im going riding this weekend and want to get some more MPH on the Quarter MIle... ONe question for you guys...there is a bike i ran that had a higher MPH in the 1/4 mile but everything we run it 1/4 distance i take him by about 3 to 4 bikes...any reasoning behind this? Edited March 6, 2009 by 305Shee Quote
305Shee Posted March 6, 2009 Author Report Posted March 6, 2009 I also got some more info the bike is +2 advance can i move it up to +4? I also believe my bike is running rich but this weekend im going to do a plug test to see exactly whats going on... Any advice? What are some good tools to take with me that are often used? Thanks Quote
sredish Posted March 6, 2009 Report Posted March 6, 2009 (edited) I also got some more info the bike is +2 advance can i move it up to +4? I also believe my bike is running rich but this weekend im going to do a plug test to see exactly whats going on... Any advice? What are some good tools to take with me that are often used? Thanks take it on up to +7.... getting it jetted right on will yield best results for what you have. ever think about backing the sprocket back down to a 15 for a little lower gearing? How are you getting your compression, a Coolhead or what? Get some smaller domes if you have an aftermarket head. Edited March 6, 2009 by sredish Quote
305Shee Posted March 6, 2009 Author Report Posted March 6, 2009 (edited) take it on up to +7.... getting it jetted right on will yield best results for what you have. ever think about backing the sprocket back down to a 15 for a little lower gearing? How are you getting your compression, a Coolhead or what? Get some smaller domes if you have an aftermarket head. I am running a stock head milled... What octane should i run if i Bump up the timing? and also should i mess with the sprockets first and then mess with the timing and jetting? or do the timing and jetting first and then go on to sprocket changing? If i have a 330 main and i beleive its running rich should i change the main jet first? . Edited March 6, 2009 by 305Shee Quote
sredish Posted March 6, 2009 Report Posted March 6, 2009 I am running a stock head milled...What octane should i run if i Bump up the timing? and also should i mess with the sprockets first and then mess with the timing and jetting? or do the timing and jetting first and then go on to sprocket changing? If i have a 330 main and i beleive its running rich should i change the main jet first? . change your gearing, go to a 15 front. then check the jetting. do the timing whenever, do it first if you want. how are you going to bump up the timing. there's more to it than psi compression when figuring octane requirements. my rule of thumb is 165 to 170 when you start mixing in race fuel and 170+ use race especially with advanced timing. you could change the main to what you think it should, then make the mechanical changes (timing / sprocket) and go out and test it out. Quote
305Shee Posted March 6, 2009 Author Report Posted March 6, 2009 (edited) change your gearing, go to a 15 front. then check the jetting. do the timing whenever, do it first if you want. how are you going to bump up the timing. there's more to it than psi compression when figuring octane requirements. my rule of thumb is 165 to 170 when you start mixing in race fuel and 170+ use race especially with advanced timing. you could change the main to what you think it should, then make the mechanical changes (timing / sprocket) and go out and test it out. Sounds like i got a busy weekend...Over the summer i plan to build from the bottom up....thats why i just got a light port more like a clean up port because im not Trued and Welded in the crank so i was scared of blowing it...but i have to admit it runs pretty dam good for the way its tuned giving some heavily ported guys trouble no one ever believes i am just ported then think im a slow stroked bike. How exactly is timing affecting the bike...how would i know what my limits are on the timing...i also thought that depending on your compression is how much you mess with the timing? How can i measure or know my RPMs? Edited March 6, 2009 by 305Shee Quote
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