yx 150cc and yx160 crankshafts

[Jonte]

Hello!

Is it possible to fit yx150 crankshaft to yx160 bottom end? Yeah, i know that yx150 have 53mm stroke, but i have heard that it have 2mm longer rod and both of them are klx-type.

 

[xLOCOx]

it sure is, make sure theyre the width, as it is possible to purchase a oil spinner type, i run the ooracing crank "57mm" as i bought a motor not realising it had a blown crank, also inspect the casings when you remove the original, as yx's are known for cracking casings around the crank bearing, (this is caused by over reving a non balanced crank)
cheers Loco

 

[motorman]

I have a full YX184 motor with TB and taky bits plus a spare bottom end for sale as well.

PM me if your keen.

 

[my67xr]

Yeah, as Loco mentioned, they use the same cases and gearbox's.

Postage to Finland might be a little dear for that engine Nick.

Here's a thread that mention's some rod length's- http://www.miniriders.com/tech-talk/24551-con-rod-lengths-how-many-different-ones-there-chinas.html

 

[Jonte]

Okay thanks guys.

Yeah the postages would be little bit expensive to Finland, but thanks anyway motorman.

 

[Jonte]

How about zongshen 155cc crankshaft, can i put it in yx160 bottom end?

 

[my67xr]

Depend's on what model YX engine you have, pic's might help ?
Also depend's on which Z155 too, early of late

 

[Jonte]

I have gen3 yx, without oilslinger. Crankshaft is from that kind of engine.

 

[my67xr]

That engine is a Z160Ho 55mm stroke 60mm bore and the bike looks to be a direct copy of the Pitsterpro LXR

 

[Jonte]

But does the z160ho crank fit to yx160 bottom end?

 

[my67xr]

Pretty sure they do, but i don't have them both apart to compare.
So why are you wanting to put a shorter stroke crank in ?

 

[chase033]

They do, we use YX 57mm 155HO cases for big motor builds

I recommend the Bucci 53/57mm cranks

Artwork

 

[Luke918273]

I know it’s been a while since someone last replied in this thread but any chance I can fit just the yx160 cylinder on a yx150 and make it close to 160cc?

 

[cieb]

Yx 160 and yx 150 have the same bore (60mm).
So if you put a yx cylinder 160 on a yx 150 you will have the same engine diplacement. (if using oem cylinder).

Unless you have a bigger cylinder!??

 

[Luke918273]

I have a parts yx160 engine and a running yx150 in my pit bike, so it’ll make no difference you think?

 

[cieb]

No difference.
The increase in cc between 150 yx and 160 yx is made by strocker crank, not by biggest bore.

 

[Luke918273]

Cheers for the help mate

 

[cieb]