Trail riding, what size domes?

[metalace2001]

I am about to envest in a cool head but i dont really know anything about them, i trail ride 90% of the time with the ocassional drag, i am buying vforce 3 reeds, and a timing plate in aditiong to what my signiture says, thanks in advance.

[Washburn]

get 18cc domes and crank your timing to around +7. Youll have to run race fuel but it will really wake up your lowend and you wont notice any dead spots in the powerband plus with the VF3s youll get instant throttle responce.

[metalace2001]

get 18cc domes and crank your timing to around +7. Youll have to run race fuel but it will really wake up your lowend and you wont notice any dead spots in the powerband plus with the VF3s youll get instant throttle responce.

with the addition of the v3s and the advancing of the timing do i have to get my carbs rejeted?

[metalace2001]

with the addition of the v3s and the advancing of the timing do i have to get my carbs rejeted?

do i have to run race gas no matter what cc domes i get, i live in md and race gas isnt really readily available anywere close to my house.

[zach45]

20 usally put you at 150 PSI.. which is the lowest for pump gas..

[sheerider1026]

i run 19cc domes, +5 timing, and 93 pump gas, no problems, just need to be on top of your jetting.

[Washburn]

i run 19cc domes, +5 timing, and 93 pump gas, no problems, just need to be on top of your jetting.

 

That I would have to say is pushing it. Im currently running 20cc domes and +4 timing and running 93 but if I went down to 19ccs +5 I would be around 165-170psi Ide imagine and that calls for atleast 100LL AV Fuel. You can usualy get that at smaller airports for around 4 a gallon.

 

Another thing I forgot to mention since I live by for every Power Mod there is a counter reliability mod. So 18cc domes and +7 Timing I would get my crank trued and welded with a maxload bearing just for extra insurance. Do you have to, NO. Is it worth getting done, YES.

 

 

I would say depending on your elevation 21cc domes and +4 timing and you should be set with 93 octane. As far as rejetting, It all depends. I dident have to change my jetting for my Noss Head 20cc domes or VF3s but I bumped my timing to +4 and put a 2:1 carb setup on at the same time with a 190 main and a 45 piolet. If I still had stock carbs Ide say no I wouldent of had to rejet. If anything VF3s will more than likely fatten up in the midrange but not so much that you have to rejet. Always read your plugs though. 1.79.00 a piece at any auto store.

[sheerider1026]

i may just be lucky, i have ran the 19cc +5 setup for years, compression lands at about 155-165.. i usualyy jet my bike a hair on the rich side, being rich also lowers a chance of detination in my book. i also run a 2 into 1 carb 35pwk. eek needle 160 main, 48 pilot

[dlnoss]

Guessing MD is close to sea level, running premium pump gas with advanced timing, I'd say 21cc domes. Give me a call if you want and we can discuss all the variables, even if you are looking at other heads.

 

-David