04 trx 450 gearing need help

[gibson450r]

just rebuilt my motor with sparks cam and valves and a higher comp piston. for mx what would be the best sprocket set up to complament this looking for bottom and mid should i just change the front or both thanks anyone who could help

[roundsy]

13/39 with 18" tires if the track isn't too wide open

i'm not sure where your riding but thats what i usually run

[gibson450r]

hey thanx i race mx in pa nj ny some of the tracks have long holeshots do you think i will rev out to fast with that

[BlaineKaiser450]

stock gearing. I have a friend with a full sparks motor and the stock gearing with 18's is perfect for him

[bloodmoney23]

I run a 13/38 with 20's right now. As soon as i get my new rims ill be at stock gearing with 18's. Stock gearing and 18's will prolly be your best bet.

[MR.BIG]

Definately stick with the stock gearing if you are running 18"s:macho

[d3ktrix]

Originally posted by MR.BIG
Definately stick with the stock gearing if you are running 18"s:macho

Agreed, once u get motor work, any gearing much less then stock while running 18's is useless.
Unless its a really tight track. You'll be on the rev limiter all day.

[Bolinracing]

I have an 05, what is the stock gearing? I think the previous owner put a bigger front sprocket on. I still has decent low end and it pulls forever. I want to lower the front for more power.

[playerz]

stock gearing is 14 - 39, i have 14 - 38 on my 05 with 18" tires

[bloodmoney23]

Originally posted by playerz
stock gearing is 14 - 39, i have 14 - 38 on my 05 with 18" tires

stock gearing on 05 is 14/38. i just looked it up in shop manual.

[playerz]

oh reverse what i said then i have 39 in rear