jack350 Posted August 18, 2008 Report Share Posted August 18, 2008 hey guys.. ok some people have sorta already answered this for me, but being 'mr. wanna know every thing bout a shee' aint satisfied i wanna buy a noss head and wanna know it back to front but not sure wat compression domes i need. i have a stock engine with vf3 reeds (not installed waitin on ebay) , t-5s and pro design foam filter.. i will be doing a compression test as ssoon as i get my hands on one.. how do i know what size cc domes i need? plz explain with my engine stock should i be lookin to be around 130 psi comp.? will i need to rejet? is adding octane boost in fuel bad? thats all i can think of for now.. but it aint the end of me :biggrin: thanks for ur knowledge Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 18, 2008 Author Report Share Posted August 18, 2008 also testing pic.. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 18, 2008 Report Share Posted August 18, 2008 hey guys.. ok some people have sorta already answered this for me, but being 'mr. wanna know every thing bout a shee' aint satisfied i wanna buy a noss head and wanna know it back to front but not sure wat compression domes i need. i have a stock engine with vf3 reeds (not installed waitin on ebay) , t-5s and pro design foam filter.. i will be doing a compression test as ssoon as i get my hands on one.. how do i know what size cc domes i need? plz explain with my engine stock should i be lookin to be around 130 psi comp.? will i need to rejet? is adding octane boost in fuel bad? thats all i can think of for now.. but it aint the end of me :biggrin: thanks for ur knowledge Hey, what's up? Nice bike!! As far as the size, a smaller dome will raise your compression, a larger size will lower it. I think stock size is 22cc. You can find a chart of what your compression will be vs. altitude and dome size at nossmachine.com under Banshee Heads. A stocker is about 130 psi when on a fresh bore. This will drop over time. You can let it go down to about 105 before you should start thinking about a rebuild. My last one was at 100psi, but I wouldnt let it get that far. Octane Boost generally doesnt work. Your going to start having to use race gas if you decide you want to bump up the compression too much. Depending on your elevation 21cc is usually the limit for pump gas. After that your going to have to search some threads and see what octane people are running. Good luck, and keep that bike clean!! I like the yellow bikes. Quote Link to comment Share on other sites More sharing options...
dragbanshee Posted August 18, 2008 Report Share Posted August 18, 2008 Yep figure out your elevation and go from there , Im at 800 asl with the 21cc with 150 psi right at the limit of being safe with pump gas. Quote Link to comment Share on other sites More sharing options...
xXBlessedWithDeathXx Posted August 18, 2008 Report Share Posted August 18, 2008 also testing pic.. man i love them fenders and decal kit. dam that looks good. i would have to cut the fronts but nice ride. she looks good. Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 19, 2008 Author Report Share Posted August 19, 2008 thanks guys i will be doing the compression test tomorrow.. thanks for thoughts. i let ya no how i go. cheers :beer: Quote Link to comment Share on other sites More sharing options...
Face Posted August 19, 2008 Report Share Posted August 19, 2008 That is a Nice, Clean looking machine! I love the Yellow skin! Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 19, 2008 Author Report Share Posted August 19, 2008 thanks i love her hahah believe it or not i have owned for 5 months and havent ridden it through all the gears yet.. (got sick, doin treatment finishin in 10 weeks and countin every second) SUX big time to add to my questions wat is the most compression i get out of my stock moter (with the noss head) before destroying it?.. and wat would be safe? Quote Link to comment Share on other sites More sharing options...
BenBB Posted August 19, 2008 Report Share Posted August 19, 2008 I agree that yellow & black looks sweet :cool: I don't think the octane booster stuff is worth it either, you're better off with good quality fuel at the right octane, or good quality race fuel, or a 50/50 mix. Reason being, detonation does a lotta damage and I wouldn't wanna risk it with a cheap bottle of god knows what. You shouldn't need to rejet for the coolhead but it doesn't hurt to double check it. The Delta's will likely want a needle clip position adjustment and might want 30 pilots if you don't have them already. Good luck. Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 20, 2008 Author Report Share Posted August 20, 2008 ok.. im ruffly around 50metres above sea level and my compression came out 75psi which i think is pretty crap. and my bros one came out 105 in the left and just under 100 in the right and it only a couple of hours old???... i will be using a different comp tester tomorrow and hoping the other one was outa wack! what do u think? Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 20, 2008 Author Report Share Posted August 20, 2008 could i have performed it wrong? i dont think it i did.. tank off, one cylinder with plug other obivously with the comp. tester, WOT and kicked till needle stopped around 5 kicks. what should i check before testing? did i miss anything? thanks Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 20, 2008 Author Report Share Posted August 20, 2008 p.s do i have to run it so its warm then test? Quote Link to comment Share on other sites More sharing options...
4stroker Posted August 20, 2008 Report Share Posted August 20, 2008 hmmm take the other plug out when you do it. what brand is ur compression tester? isnt this bike only a couple hours old? also if you use BP98 fuel you can run 19cc noss domes if you are on top of your jetting. you having just started out in the banshee game though i would get 20cc domes and advance the timing 3-4 degrees. there are 801,025,103 posts on this subject in this forum, i just counted Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 21, 2008 Author Report Share Posted August 21, 2008 hmmm take the other plug out when you do it. what brand is ur compression tester? isnt this bike only a couple hours old? also if you use BP98 fuel you can run 19cc noss domes if you are on top of your jetting. you having just started out in the banshee game though i would get 20cc domes and advance the timing 3-4 degrees. there are 801,025,103 posts on this subject in this forum, i just counted i used a different comp. tester and the other one was faulty :sweat: thank God for that.. my comp came out 112 and my bros came out 140 in one and just under 150 in the other.. if i get the 20cc domes and dont advance the timin wouldnt run as good? how much difference would it make and why??? thanks Quote Link to comment Share on other sites More sharing options...
jack350 Posted August 21, 2008 Author Report Share Posted August 21, 2008 (edited) i used a different comp. tester and the other one was faulty :sweat: thank God for that.. my comp came out 112 and my bros came out 140 in one and just under 150 in the other.. if i get the 20cc domes and dont advance the timin wouldnt run as good? how much difference would it make and why??? thanks ps roughly how many hours do i have left before i have to rebuild? Edited August 21, 2008 by jack350 Quote Link to comment Share on other sites More sharing options...
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