Yz125 Blaster

[Hitt99]

I don't understand how a 125 motor will not work in a blaster chassis and an 85 will. It seems like it would. A lot of 90 mods use 85 motors. I would like to understand why the 125 would not work.

[fastR of puppets]

who ever said it wouldnt, they work fine, if you can fit a 250 motor in a blaster than ytou deffently can fit a 125

[Hitt99]

My question is not wherther it will fit but about the hp torque and gearing. I have read a few threads about using this motor. My son is ready for more power but is not ready for a 250 motor, and I just wanted a water cooled motor.

[fastR of puppets]

alright what do you want to know about the hp and gearing, its not gunna make any more power tahn a modded blaster motor, just get a ported and stroked 240

[flotek]

with the right pipe and porting it can make 35 on gas and probably 40 on alky which is about where just a bolt on big bore airsal cylinder wit h the common cheesy unversal port would put you .

[Hitt99]

Eviltwin, so are you talking about the 125 or the Blaster? The 125 I have has the VF3, FMF gnarrly pipe and no porting. The blaster motor is plain stock. For the money which would be best to go with?

[fastR of puppets]

the blaster is going to be cheaper and if you really did go for it you could ultimatly make more power with it then possible with th 125

[supermini]

you can get a 100cc supermini motor thats made from a cr85 motor 1500$ and its from honda 100cc cr 85 motors work well in basters , we run a 85 in my sons supermini laeger quad and trust me the jb 90s and hybrid 90s are quick as quick as a built blaster , "as race machines" not trail riding.

[flotek]

Originally Posted by Hitt99

Eviltwin, so are you talking about the 125 or the Blaster? The 125 I have has the VF3, FMF gnarrly pipe and no porting. The blaster motor is plain stock. For the money which would be best to go with?

i was referring to a modern 125 engine ... the blaster big bore can make more torque and hp probably and realistcily around 50 rwhp on gas once highly modifed , as far as comparing a stock bore oem bore and stroke blaster to a 125 ,the out put would be close id say the blaster can make more usable power i n the end wit ha wider powerband but not as high an rpm obviously ...although the blaster engine wil l require extensive head and port work and top notch bolt ons to acheive this .
-Denny

[Hitt99]

I like I have decieded to stay with the Blaster motor. I'm going to put a high comp. piston(have to bore cylinder)and a bigger carb. for now. what kind of porting would be best, eviltwin? is it better to bore first or port?