Evan Frucht
Member
- Local time
- 3:41 AM
- Joined
- Oct 23, 2017
- Messages
- 42
Hey everyone,
I know a couple things about these engines and am somewhat experienced with small engines in general. I have a probem I can't figure out.
I put my bike together about a month ago and have been feeling an increase in power since the first rides (assuming break in). I actually had to lean it out (needle adjustment) one notch recently to get it to idle properly and not die. That was after a long ride when It really warmed up. Anyways it been running very well for a little while now.
I have a custom made expansion chamber on it, bing 14mm moped carburator ( very similar in design to the stock NT but better quality and made in Germany, came off a 60's moped, #65 jet), long intake, and puch 70cc old style hi compression head, among other things. Those are the basic upgrades I've made.
I tried to take it for a ride a few minutes ago but it didn't sound right (it was running fine an hour ago.) I started it in my driveway and pulled the clutch in so I could let her warm up a few min..., this is what I usually do. But this time when I pulled the clutch in the idle was very rough and then quickly got higher and higher. Sounded like an air leak but I've checked thoroughly for those. Funny thing is that it seems to run fine normally with clutch engaged. It's only when you want to stop and idle does it start reving like crazy.
Did my clutch possiby fail? I tried adjusting it thinking it may have come out of adjustment but that's not the case. (When I tightened it slightly it wouldnt release at all.) There is play in the clutch arm when it's out, not sure if that is normal?
I've checked for air leaks in the usual places. I've opened up the carb and sprayed some cleaner through the jet, seems to not be clogged.
Any ideas?
I know a couple things about these engines and am somewhat experienced with small engines in general. I have a probem I can't figure out.
I put my bike together about a month ago and have been feeling an increase in power since the first rides (assuming break in). I actually had to lean it out (needle adjustment) one notch recently to get it to idle properly and not die. That was after a long ride when It really warmed up. Anyways it been running very well for a little while now.
I have a custom made expansion chamber on it, bing 14mm moped carburator ( very similar in design to the stock NT but better quality and made in Germany, came off a 60's moped, #65 jet), long intake, and puch 70cc old style hi compression head, among other things. Those are the basic upgrades I've made.
I tried to take it for a ride a few minutes ago but it didn't sound right (it was running fine an hour ago.) I started it in my driveway and pulled the clutch in so I could let her warm up a few min..., this is what I usually do. But this time when I pulled the clutch in the idle was very rough and then quickly got higher and higher. Sounded like an air leak but I've checked thoroughly for those. Funny thing is that it seems to run fine normally with clutch engaged. It's only when you want to stop and idle does it start reving like crazy.
Did my clutch possiby fail? I tried adjusting it thinking it may have come out of adjustment but that's not the case. (When I tightened it slightly it wouldnt release at all.) There is play in the clutch arm when it's out, not sure if that is normal?
I've checked for air leaks in the usual places. I've opened up the carb and sprayed some cleaner through the jet, seems to not be clogged.
Any ideas?
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