Arm pump. That's what the yanks call it. Dirt Bike and MXA have had articles on it. It may not be your case. They say in the following article it may be due to many causes including carpal tunnel syndrome, ganglion cysts, arthritis, neck abnormalities, tennis elbow and fractures. I had a similar condition when I was 16 but it went away with time. Here's the article:
Tr80's whether 250's or 350's all had the same tank/seat design. I have a couple of yellows and an orange and they all have the same seat with a metal "hook" that fits in and under the tank held down at the rear with two bolts that thread into the frame.
It happened to me, as well as slightly bending the kick start. Played around with the stator but that didn't cure the problem. Woodruff key was ok as everything else. So I put a new stator in. That fixed it.
Check you get a spark. My 310's spark is hardly visible so don't do it in sunlight.
But I suspect if you left the fuel on then your carb is probably bunged up with a sticky mess of dried fuel and oil residue. Open up the float bowl and have a look. Try giving it a clean if it's too bad then you can get all the parts from:
Thank you Woody. With this one I can't take the credit. It's a one off. But it is a deeper orange and the black is also deeper. The bike was one of the first 250's off the production line and its original colour may have been yellow. But its is a full blooded 250 and smooth on the throttle.
Read the article or bablefish it. It says it's a 50cc and the pic jpeg properties seem to justify the 50cc description, but yet again Darwin may be wrong.
Four Stroke Bultaco?
in Bultaco
Posted
The Blancafort Sherpa has:
Sherpa 199 engine but......
Yamaha SR 250 road bike cylinder.
Bespoke con-rod.
Honda XL front brake.
Cota 247 rear brake.