My son just bought a 2002 blaster as a project. He was told that the pistons and rings were recently replaced. The headlight, kill switch, rear brake, and kick starter didn’t work. We fixed the kick starter and I should be good with the others parts. One thing that bothers me is that it seems underpowered and it revs pretty high easily. That sounded like an air leak so I looked around and found that a previous owner had disconnected the oil pump but didn’t put a cap on the oil intake on the carb. I put a cap on the oil port and it runs a little better but not great. What is the next move? Replace the cylinder/piston/rings or run a leak test? The rubber boots into the carb look like they are held on with lousy radiator clamps so that might be a start. What do you guys think? Thanks
compression test and leakdown test, report back those findings and we'll go from there.
leakdown testers here if you need: https://www.blasterforum.com/threads/leakdown-testers.55015/
leakdown testers here if you need: https://www.blasterforum.com/threads/leakdown-testers.55015/
If the previous owner did not block off the nipple on the carb you might want to look into how they blocked off the pump.
I ended up doing a traditional oil pump delete, and the piston and cylinder were cruddy enough that I decided to replace them both. As I tore it all apart I found misplaced gaskets and missing gaskets galore. It’s become a rebuild. One hurdle I have hit is that the crank seems to be locked—I can’t budge the piston at all, even with the cylinder off.
Hopefully you haven't already purchased a cheap eBay kit. Get the stock cylinder bored.
