Search found 7 matches

by atp
Sun Aug 25, 2013 6:19 am
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

OK, that will be my next step, I found this video for pressure testing the case of a 2 stroke http://youtu.be/ySu2NC1X7s4 anybody have an opinion on it? could I go higher than 6 psi? seems kinda low to me, considering. If I could regulate my compressed air down to 10-20 psi and use soap water it ...
by atp
Sat Aug 24, 2013 6:33 pm
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

I tried poking the exhaust with a welding rod and got about ~6" in before I hit a baffle? seems grimy but not clogged, wouldn't I get a persistent rich condition on plug chops if it were? because most look good, but are more towards lean. I've tried most every permutation thus far: open carb, carb ...
by atp
Sat Aug 24, 2013 2:30 pm
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

I will move it back to .025" I detected no improvement anyway. I was beginning to lean (no pun intended) towards a fundamental mechanical failure as opposed to a tuning issue. I've never heard this scoot run since it was in failure when I bought it. The two that I considered were clogged exhaust ...
by atp
Sat Aug 24, 2013 7:22 am
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

I began to suspect my inductive tach was off, so I used my older tach and hooked it directly up to the switching wire of the coil. I probably wasn't idling at 2500 rpm after all since it was closer to 1800 rpm on the second tach. After realizing my gaff, I started back from scratch and used twilight ...
by atp
Sat Aug 24, 2013 3:17 am
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

I thought so too, I'm using my automotive compression tester that I use at least once a month. I used it last week to confirm a dead mis on a 4.0L jeep, it gave consistent readings then, and I've used it before and after that. I thought maybe it wasn't seating properly, so I tightened it down with ...
by atp
Fri Aug 23, 2013 7:58 pm
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

Re: tuning and break-in problems on 48mm bbk on 85 spree

Great, thanks for the info. I replaced the main jet that came in the kit. it is an 87, I don't recall what the original was. Did you happen to do a compression test after break-in? and if so what were you're results?
by atp
Fri Aug 23, 2013 5:06 pm
Forum: Performance Technical
Topic: tuning and break-in problems on 48mm bbk on 85 spree
Replies: 13
Views: 12534

tuning and break-in problems on 48mm bbk on 85 spree

So I bought one of Taz's 48mm kits on ebay and installed it. Granted, I never ran the bike previous to the installation since the old cylinder was * up when I bought it. I have followed the break in instructions provided and it starts and idles great, but my main problems are twofold, which is ...