[slayerklx]

This is the top end im planning on using... what piston will I need? I've seen they make one for a race head and one for the stock.... but is a yx head 4 valve?

 

[dood]

Just get the race head piston. The valve pockets are cut out for big valves.

 

[firepower354]

The 63mm piston is discontinued, from TB. Might still have one around, but you'll likely have to notch the BBR slug or bore for a 64mm piston. Or 66mm Wiseco

 

[slayerklx]

What mm is the bbr? What cc will a 64mm piston give? Getting a stroker crank too... Will I def have to notch it for the yx head?



Dood, what do you think?

Firepower, could you give me a quote for the kit? May order from you as the exchange rate isn't bad at the moment.



Thanks for the replys.

 

[slayerklx]

Bump

 

[dood]

What mm is the bbr? What cc will a 64mm piston give? Getting a stroker crank too... Will I def have to notch it for the yx head?



Dood, what do you think?

Firepower, could you give me a quote for the kit? May order from you as the exchange rate isn't bad at the moment.



Thanks for the replys.

bore x bore x stroke x .7854 will give you your cc's.



Most BIG pistons are already notched for a big valve head such as the YX or V2, etc, etc but just like anything, you'll have to check for clearances.

 

[kawaiboy404]

get the v2 head yx are barely better than stock u get wat u pay for its all about the v2 roller rockr valves bubby with a tb 143 08 outpashft quick shift 4th gear drum ull be good..

 

[slayerklx]

This is the BBR piston I have



IMAG0013.jpg



Will a YX head bolt up?



What about with a 55mm stroker?



I know I've asked this before but I'm unsure how to check clearances without a micrometer/ depth gauge.

 

[dustinmoto425]

I agree with kawaiboy404 V2 is the way to go.

 

[firepower354]

That BBR piston won't clear any race head, or even a YX, at least without being way in the hole. It's 63mm and can be notched, but isn't a real high-end piece. If you have a steel sleeve, 69mm spigot, bore it for a decent piston, and add any head you fancy.

 

[slayerklx]

so this is for stock head?



got any race head pistons the same size?

 

[dustinmoto425]

I sent a bbr tech and email not to long ago after my bike blew up and this is what he recommended. I didn't want a race motor just a durable motor. Hope this helps



For durability, I would put an OEM crank and new oil pump in your bottom end. While you've got it apart, bore the cases for our 160 bore kit. It is pretty cheap and makes great power. This is the bore kit we're winning races with. For the head, you'll have to decide if you want keep the YX head or not. Personally, I'd go with the Kamikaze big valve head. It makes good horsepower and is dead reliable. Also, make sure you have a good output shaft and gear when you have the transmission apart. You probably already have a 4 speed shift drum.

 

[slayerklx]

Dustinmoto, did you run a yx head with this kit? was it the same piston?



Anyone, will my piston in the pic work with the stock head (for now) just wana get this thing running!

 

[firepower354]

Anyone, will my piston in the pic work with the stock head (for now) just wana get this thing running!

Yes

 

[slayerklx]

Nice 1 firepower