ASP Need Help

[inspectorcritic]

I blew a piston last night this morning I grab a piston out my bone yard put it in a long with bearing, piston moves freely without the head on soon I put on the head motor jams right up?

I'm in the process of replacing the jug same one that came with piston.

Any ideas on what's jamming it?

 

[Spare_Parts]

My guess is your engine is a long rod and you used a piston from a short rod engine. Compare the pin height from the old piston to the new one.

 

[inspectorcritic]

The piston is hitting the head could that an oversized piston or a 66cc on a 49cc jug?
I thought the cc was width not length.

 

[Lukesky36]

Type A and Type B pistons are different check the pin holes on both and make sure they are the same height

 

[inspectorcritic]

Type A and Type B pistons are different check the pin holes on both and make sure they are the same height

Thanks for your reply.
Is it possible I put the piston in backwards?
I put it in so rings ends miss both ports.
I have another head that came with the piston I'm gonna try that also got a frank air head next I've got 4 or maybe 5 spare head gaskets I'll try to shim it if not I'll shove it in the dumpster and call Bikebury hope before 5 for another motor unless you know of a better motor replacement store.

 

[inspectorcritic]

T

My guess is your engine is a long rod and you used a piston from a short rod engine. Compare the pin height from the old piston to the new one.

Hanks for your reply.
Know of any good motor stores for a replacement?

 

[inspectorcritic]

Yippie got my ride going again who ever guess the piston bushing hole was right it was a motor from California motor bikes you just make out the piston in the middle rides about 1/4" or more high. Had to sit for half hour and bang on another motor to get the rusted pin out glad I didn't give up!
So I'm down here at Fuzzy's having a couple sconers of beer celebrating.
Thanks for the help.

 

[Lukesky36]

Your Welcome

 

[inspectorcritic]

Your Welcome

I got a long verticle scratch inside the cylinder is that giving me low compression.
But, f*** the wheel is so damn hard to turn over to do the test.

I have another clean cylinder I can put on but to turn for Max if
112 PSI is gonna take a lot of muscle.

 

[inspectorcritic]

Your Welcome

Oops latest test result on compression, it's starting look more favorable what do you think?
I have scratch in the cylinder should I replace the jug to get more compression?
I had to stand up on the pedals to pedal it to get a good reading.
I