225cc Airsal Cylinder Kit

[79 bronco]

This is the first time i have seen this on ebay, its a Yamaha Blaster YFS200 225cc Airsal Cylinder Kit.>> http://www.ebay.com/itm/Yamaha-Blas...Parts_Accessories&hash=item56689ad4be&vxp=mtr

 

[Herpderplol]

whyy....?

 

[Awk08]

nice to see these are still around and at a decent price, but i wonder what size piston it requires and if it's readily available ?

 

[Herpderplol]

i would assume 69-70mm pistons

 

[jus_me]

It would be a 71 mm piston, then up from there..

Stroke 57mm x bore 71mm x bore 71mm x .0007854 =225.6

 

[Awk08]

It would be a 71 mm piston, then up from there..

Stroke 57mm x bore 71mm x bore 71mm x .0007854 =225.6

there is no up, this is a nikaseal lined aluminum cylinder, no steel sleeve to overbore.
as are all the airsal's

 

[jus_me]

^ you're right I forgot about that. I found one sight with pistons but it's in German or something. Other sites call the 225 a 240 kit ??

http://www.mhr-usa.com/piston-rings/71mm/

 

[Herpderplol]

how does a 240cc kit use a 72mm piston and a 225xx kit use 71mm piston? which one is lying!?!?

 

[Awk08]

how does a 240cc kit use a 72mm piston and a 225xx kit use 71mm piston? which one is lying!?!?

the 240 kits are lying

72.00-big bore =232CC
72.25 - .010 = 234CC
72.50 - .020 = 235CC


http://www.blasterforum.com/threads/cylinder-bore-to-ccs.23137/

 

[Herpderplol]

the 240 kits are lying, it's not even 240cc on it's last bore

72.00-big bore =232CC
72.25 - .010 = 234CC
72.50 - .020 = 235CC


http://www.blasterforum.com/threads/cylinder-bore-to-ccs.23137/

oh, then a 71mm 225cc makes sense.

i thought 72mm with the +6 rod could make a 248cc? yes or no there?

 

[Awk08]

oh, then a 71mm 225cc makes sense.

i thought 72mm with the +6 rod could make a 248cc? yes or no there?

72.50mm with a +3 crank = 248cc

the +6 crank w/ 72.5mm piston comes out to 260cc

63 x 72.5 x 72.5 x .0007854 = 260cc

 

[Herpderplol]

who got a +6 crank? i thought someone ordered one. was it wifes?

 

[Awk08]

who got a +6 crank? i thought someone ordered one. was it wifes?

I think ken rebuilt wifes blastersaurus engine with a +6 crank and BBK cylinder ?

 

[BlasterFun484]

Yes, hes pairing it with a dynoport now too, i am building that same engine as we speak..... Slowly

 

[BlasterFun484]

Ct240**

 

[DUALSTROKE]

An airsal 240 kit uses a 71mm piston. Unlike most bb 240 kits that start off at 71.95/72 mm pistons. One can only assume that is a airsal bb cylinder. Both airsal and ct make a 200 cc cylinder to stay within rules for mx.
My second dragger runs a +6 Kor beast mode crank.

 

[79 bronco]

Most big bore kits are measure on its last bore.
CT240
first bore 72.00mm = 232CC
72.25 - .010 = 234CC
72.50 - .020 = 235CC
Last bore 73mm = 239CC

 

[79 bronco]

Do you think they are using this blaster Aluminum Sleeve with a bore size 67-74mm. http://www.shopengineparts.com/prod...aha&model=YFS200+Blaster+-+(88-06)&type=model