05 yz 125 big bore kit(134cc)

[awya14]

any one know anything about it ?good or bad..problems , advantages

[RyanB58]

Ummmm,

I had one on my 2002 YZ and the thing was wicked. But it still was not up to snuff with a 250F so I made the switch. It was really fast and for a 125 had considerable amounts of low end, but when it came to it the 250F was a much more foregiving bike. Never had any problems with it, but I believe that in competition in AMA no overbore is allowed. You might check on that if you compete in AMA races.

[awya14]

Rodger that good buddy ...lookin forward to it

[sxy rider 39]

up to 144s are legal in AMA amateur racing this year.

[RyanB58]

144s, oh crap I am going back too two stroke. J/K

[awya14]

hey, I tried the yamaha 2 stoke forum .but got nothin .....ping ppppping ping ,sorry

[shift1313]

are you having someone install the kit for you or are you going to tackle it yourself? If i remember correctly you need to do a good little bit of port work once the cylinder is bored out and replated. There are no problems at all with going up and it will help your lowend out a bit but just make sure your machine work is done right.

[awya14]

Some one else is doin it ..and I pretty sure hes on of the best around (here anyway)

Its actually my bros bike ..hes just got really slow dail up(too slow) so Im lookin in too it 4 him ,Im a thumper man my self

I think the guys name is Titan or maybe Titan racing...I dont know I hear hes pretty damn good though

[RyanB58]

I had RPM do mine when he was doing two-strokes still. It was the most professional work I had ever seen. I shipped it on Monday and had it back on Friday, very good work. I know he has someone in Michigan doing his work on two strokes now.