- Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
I have used and abused the bore up kit for 2,500 kilometers of hard trail riding, steep hill climbs, river crossings and all day hi way runs to get to the trail. In my opinion, the quality is as tough...Read More - Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
Nice upgrade for XTZ while it was running.
Package nice, arrived on time. Installing was easy, broke in went without problem, after that engine was running more quiet, smooth than stock. (Process: ...Read More - Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
It's well made and the performance is fineYou will definitely feel the torque upIt's not a Large wide Bore up, so it's still very Engine friendlyThe cheap ones made overseas were inaccurate or had to ...Read More - Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
I purchased the kit for my Yamaha YB125SP without camshaft as I was unsure of the performance value. But after installing the bore-up kit I immediately order the sport camshaft at a later date. The ki...Read More - Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
I was able to install it almost as a description, it was for YB125SP but there was a bit of anxiety and ordered with without Camshaft I regretted it, (Purchased at a later date) As Torque rose from 12...Read More - Fits:
- YAMAHA YB125SP JYM125-3F
- YAMAHA YX125/DX JYM125-3G
- YAMAHA XTZ125 JYM125-9
Currently, I'm impressed by break-in.What I wanted to improve1. Although it became better with carburetor exchanges, further improving inefficiency on uphill slope2. Improvement of DASH force on O...Read More
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