TB Bore Kit

[h0ckeym0nkey36]

I am going to buy the TB Bore Kit with Race Head, but i really wannna know if it is completley noticeable. all i have on it now is the CDI Ignition Box. So i need speed and this is the right route .. correct?

[Air250]

ya and its worth every penny. very noticable.

[CRF50Racer]

I am going to buy the TB Bore Kit with Race Head, but i really wannna know if it is completley noticeable. all i have on it now is the CDI Ignition Box. So i need speed and this is the right route .. correct?

H*LL YES IT IS! your going from 2.5 h.p. to around 8.5 h.p. and if you need more speed, then you should change your gearing... the bore kit will only help in acceleration, and the amount of fun you have

[tharper127]

Yes, I dont even have a race head, and there was a considerable difference. I was in 1st gear and i lifted on the bars while hittin the throttle and it almost threw me off. Of course im only 5'2 112 lbs though... Oh wait, it is for a 70 right? If so, then i dont know cuz im talkin about a fiddy.

[CRF50Racer]

And i forgot to add..... this bore kit is a good recipe for standing it on the rear wheel!

[h0ckeym0nkey36]

Ok about the gearing.. How and why do i do this

[five0addict]

8.5?

not even close

more like 6.5-7

[five0addict]

Ok about the gearing.. How and why do i do this

http://www.ministothemax.com/hop_ups_regearing.htm

[CRF50Racer]

8.5?

not even close

more like 6.5-7

I'm just repeating what a guy who put this kit on a Dyno told me

[h0ckeym0nkey36]

What size sprokets should i get. And where do i buy them

[Kx250FRiDeR651]

What size sprokets should i get. And where do i buy them

i asked that in a post awhile ago and from what i remembered they said they were running 15/37

[Jetster220]

Actually Five0 its more like 7-7.5hp.

[tharper127]

Does anyone know if the 15/37 gearing is good? I was thinking about going with the 16/37. Or, should i buy both the 15 and 16 sprockets, try them and see for myself? Thanks.

[Jetster220]

15/37 works the best on a 88 Racehead. Its a very good mix of topend and acceleration.

[tharper127]

ya i heard that was good, but i dont have a race head...

[Jetster220]

Works good on stock head as well. Basically just a good all around gearing, heck even ran it on my 108 for a bit.

[h0ckeym0nkey36]

1 more question.. If i do get the 88 with race head... would it beat ne stock bikes. my friend has a yamaha ttr125. Ne closer?

[CRF50Racer]

it will smoke the stock XR/CRF 50 bikes.... there will be no competition

[Jetster220]

It will be very close with a stock TTR125.

[tharper127]

It will be very close with a stock TTR125.

If you change the gearing alot...