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Started work on a new build. Picked up an 87 kx80 (mainly for a parts engine) for my ar80 build. Came as pictured and with an extra engine. I wanted to turn it into a street only bike, so the long travel forks and mismatched wheel sizes needed to go. Pulled the front end off and sold it. I...

Picked up an 82 kawasaki ar80 last summer from my work. (pic below) Stock carb had no pilot or needle adjustment, so i swapped in a 21mm mikuni to replace the stock 18 and replaced the original tires. Then i drove it around for the summer. Was a fun little bike and did around 60mph with the...

Bought this titled running (poorly) ar80 recently. Installed new tires and removed the battery box and air box as neither had the side covers. Changed out the cdi box and installed new lights. Tried tuning the stock carb, but it is very limited as to what can be done with it. Stock needle...

I've got an 82 kawasaki ar80 that won't rev easily past 7000 rpm. it will rev to about 8000, but doesn't make much power after around 6500-7000. max hp is supposed to be at 8500 rpm and the "redline" is at 10,000 rpm. It's not a carb issue either. i completely cleaned the carb and the filter...

Just picked up a yamaha rd125 twin and it has no spark. I hate electrical, so this is a learning experience for sure. Bike has great compression and is now getting fuel after i cleaned out the carbs. Only thing holding it back is spark. I have a manual for it and i tested the coils. Primary...

I've got a 100cc bottom end off a km100. I had thrown a g4tr top end on it and started it up. Made a horrible clicking noise with lots of vibration. Thought it might be something in the top end, so i took it off. Still makes the sound. It makes the sound only ever full rotation of the crank...

Looking for any info on changing ignition of a kawasaki 90 - 100 cc rotary valve engine to a CDI ignition from a kx80/125 or similar machine. I've heard of people doing it, but they never provide details. A person or two have done it on the forum even. All they've said is that minor...

It seems like all the small (sub 200cc) 2 stroke machines end up here, so i figured i'd post mine here as well, even if i feel that it's a cafe. Not too much to say about it. Bought it for way too much money about a year ago without really researching it at all. At the time, small 2 strokes...