Sorry it took so long to get back..Thanks for all the tips..I will rebuild the carb and put all stock parts in to make sure they are correct. I wasnt sure what the needle jet and the main are.

Ive swapped out old plugs that fouled after it cooled and they dont work...only a fresh plug will do..Can I use a hotter plug and what would that be?

This keeps happening on a fresh rebuild, Im running 40:1 premix but I keep fouling the plug after about 1 hhour ride time. I take the bike for short rides and after about the 3rd or 4th ride , the plug starts missing and then she wont run. Swap the plug..everything is fine. Am I getting not enought ...

Update to my problem...After some great instruction from AZ shorty..I reinstalled a .02 over piston with proper ring gap and piston skirt measurement.\ Ran into a problem with the shift mechanism not installed properly when I took the magneto cover off to set the points. Got that solved finally with...

Okay I will do that..I have it apart now..So use a feeler gauge with th old piston in? Can you explain a quick walk thru on what I should be seeing for a ring gap when I get the rings on? Sorry for the basic questions but I want to make sure Im doing it right. This is my first build with a bike I do...

I made a rookie mistake and just cleaned the cylinder...assuming it was a standard bore. The ring gaps seemed okay and I never checked the previous piston because it was so carboned out. So live and learn a painful expensive lesson...measuring the bore it is 56.37..the old piston was 56.22. Should I...

got it ...thnx

I checked the old piston. It has 20 stamped Torwards the back on the top of the piston. I installed a stock piston. Is this .20 over? Should I go ahead and replace? The new stock piston has a 7.5 stamped.

Ok quick update... Checked the spark..its good with plug outside the motor. compression is just under 90 after it stopped going up. I put fresh gas in and checke the carb one more time..float needle seems to be working fine(goes in and out as the float moves). petcock is good with good flow..still n...

OKay..Got it..set the timing at the top and they seem to open the most at the second mark to the left of the top...I set them at .014 in there. I will kick it wide open throttle until it stabilizes and report back..Much thanks to all, for helping a newb out.. oh yeah tried starting fluid spray into ...

Ill go through what you said..Im a newb at the timing thing, I never touched it.. Any advice on how to do it or should I try to youtube it?

Piston is installed forward...fuel runs out of carb when I take it off and turn it sideways. When its on the bike ..no . Compression just under 60
psi after one kick through.

checked compression..its good, new top end...

Rebuilt the carb again ..checked the petcock and observed fuel going to the carb(even took the line off with petcock and got a good flow.
Now Im kicking it over and getting a dry plug. Carb seems all clear, checked all needles and they are clean..another mystery

I took the carb apart again and put it back on...Will try it again with the pipe off.. Thanks guys..

Thanks guys..I will try all those and get back to you..When I put the carb on the first time it did run with the pipe off, I will try that again.. I put a tiny bit of 2 stroke oil in the cylinder when I put the piston back in so I might be fouling the plug. This is my first vintage build so please b...

Yes..I pulled the plug with it still attached to the wire...kicked the starter and got good spark off the plug...

new plug...new fuel filter..any other ideas..this should fire right up..Ive done alot of modern 2 strokes with my sons bikes..dont get why this is giving me fits...

Little help figuring this one out..I just got done restoring a 73 hodaka wombat..I installed a new piston and rebuilt the carb with all new gaskets , a new float and needle valve. Spark is good and I did not do anything with th magneto or points.(previous owner had the bike running but it sat with a...