|
|
Post by lain on Oct 29, 2015 10:08:23 GMT -5
It says in the description it fits the 139qmb as well, does that mean you can put this variator on a 50cc and a 150cc? |
|
|
|
Post by lain on Oct 28, 2015 11:19:38 GMT -5
as i mentioned earlier on in this thread,,,the chassis will be and is the weak link in this build now,,,everyone gets caught up in HP numbers and completely overlook torque ,,even by Dans admission on another similar build the chassis exibited weakness and was overwelmed by the mill,,,if it was my bike i'd be giving the frame ( the welds in particular) the real long look and i would be considering a few judicously placed gussets and adding welds here and there to stiffen up the frame,,,i think your gonna need it,,, I wish you were close to Boston, we'd have so many projects man |
|
|
|
Post by lain on Oct 28, 2015 5:26:41 GMT -5
havent put the uni on yet.. the jet that is in it now is likely a bit too big for the airbox.. although.. before this all happened.. it did run fine.. will try to sort this out after work today.. thanks for the ideas... Hmm... Did you change your spark plug after you foubnd out your combustion chamber was flooded with oil? The spark plug most likely got oil in it, it would make the spark plug fouled if not cleaned realllllly well or replaced. |
|
|
|
Post by lain on Oct 27, 2015 20:46:21 GMT -5
Ever ran a 50mm kit w/ 24mm (150cc) carb. I am curious why you would step up cc's and not try a 24mm carb. Sounds cool,but I'm willing to bet it will be stubborn to start in the cold... w/ out kicking. Good luck, I like 50 BBK bikes. Update lrt and let us know if you mean gps on those speeds. This may be relevant; I just installed a 150cc (24mm) carb (with #105 jet)and intake and spacer on my 50mm bbk scooter with big valves and holy shiz! Going uphill at 50 with a passenger! The speeds are incredible. I am using 8g weights, stock gears, 10 inch wheels, stock crank, 50mm bore, big valve racing head, stock exhaust. I never thought this power could be attained on a scooter that used to be a 50cc, it feels like there is torque through the entire range of movement, even engine stopping is faster! It sort of feels like a 125cc scooter, it's just insane. I actually was just playing around and figured it would be a laugh to install it and see how it would bog out, but it didn't! It never ran better! I urge you to try it steve |
|
|
|
Post by lain on Oct 27, 2015 12:18:47 GMT -5
Sounds like running slightly rich at the idle or possibly the beginning of mid range (where the needle position starts to effect mix). Try a smaller main jet by 1 or 2 numbers. But before that try adjusting the needle position. Could also be slightly off timing. Check valve gaps again, make sure they are what you set them to. Could also be slight intake leak, check the manifold and intake spacer for cracks and make sure the gaskets are not torn up.
|
|
|
|
Post by lain on Oct 27, 2015 12:07:28 GMT -5
I'm having a hard time following this thread, is the title still true? Broken engine hangar???  Yep New part mailed yesterday, will arrive Friday. What caused it to break? Bad welding? Excessive vibrations? |
|
|
|
Post by lain on Oct 27, 2015 11:51:09 GMT -5
Hey so I'm not sure but do different intake spacer sizes matter? I just got a spacer with inner diameter of 17mm, my old one looks slightly larger of a hole. Would the new intake cut performance or the amount of flow? The carb is a keihin 18mm carb and the engine is a 50mm big bore with big valves.
|
|
|
|
Post by lain on Oct 27, 2015 10:01:25 GMT -5
I'm having a hard time following this thread, is the title still true? Broken engine hangar??? |
|
|
|
Post by lain on Oct 26, 2015 14:50:18 GMT -5
Well that explains why my 150 engine was leaking when I had it sitting in a box for so long it got moved around and was on it's side for a month or so took it out and saw some oil come out of the exhaust.
|
|
|
|
Post by lain on Oct 26, 2015 12:15:47 GMT -5
The real thing to diagnose here would be WHY. I mean oil doesn't go into the cylinder normally. The Bike laid n its side for Who knows how long. Ive marke the Oil Ring scavenging holes, The Oil Ring is scavenging Excess Oil from the Cylinder and those Holes Drain Back the Oil to the Crank case. The Scoot on its side for ?? long will get oil up through those holes and through your ring End Gaps and the Cylinder.  But he said he had it working recently then he had to get it fixed right? |
|
|
|
Post by lain on Oct 26, 2015 9:59:19 GMT -5
so.. update.. more data to offer as well.. there was a build up of oil in my cylinder.. said he took the valve cover off and oil blasted out.. not just a little bit running out like normal.. but sprayed it out good. 2 days before I had this issue happen, I had a belt brake.. had a buddy take my bike on the back of his truck to the shop. well.. it wasn't strapped up, but leaned over a bit. mechanics suspicion is this allowed extra oil to get into the engine and since it only has a pump that blows into the engine but not back out, the oil was trapped and it built up pressure to where compression was too much for the starter motor. once the extra oil was removed, it starts on the old starter and the new kickstart i just added. le sigh.. new starter arrives today.. new bendix on thurs.. that i don't really need now. and if i paid mechanic prices for this guy, i wouldn't keep going to him. he is a good guy, and is very knowledgable, but definitely isn't 'new school' for anything. (not that a compression tool is new school) - he works on scooters for a living.. and if given time, he can diagnose anything.. his understandings of how everything work are great.. and his prices are fantastic.. this is the first time that i have stumped him this bad... The real thing to diagnose here would be WHY. I mean oil doesn't go into the cylinder normally. |
|
|
|
Post by lain on Oct 26, 2015 7:30:01 GMT -5
Boom! Data Now were talkin  I thought the EPA just passed a new regulation making it illegal to take a measurement, punishable by a fine of $5,000 and 6 months in jail. A joke, yes? |
|
|
|
Post by lain on Oct 24, 2015 13:22:41 GMT -5
I have a couple slightly used 3 electrode plugs I want to clean up and use again, but I am noticing one of the electrodes on both are not the same distance between the center as the others. 3 Electrode plugs are not like traditional plugs where one electrode would hover over the center, instead on 3 electrode plugs they all just come close to the middle from the sides and end close to the center at about the same height as the center conductor.
|
|
|
|
Post by lain on Oct 24, 2015 7:01:04 GMT -5
I was assuming he used a tester and that's how he came to the conclusion that he had too much compression, and the starter was a byproduct of it. Either way, high compression or not he should still be able to start his scooter.
|
|
|
|
Post by lain on Oct 23, 2015 9:42:38 GMT -5
How would you possibly jump your scooter without hooking up the jumpers to the positive and negative leads that go to the battery? If you hook up a starter motor to another battery maybe, but I would be worried a car battery would have WAAAAAY too much cca and would push it too hard, but if you are saying you get the same slow push fromt he starter being hooked up to something that would normally make it overpowered and it's still acting up I would say it's the starter motor itself. I mean I have had a half a dozen BBK scooters now over the last summer and everything and some of them had issues liek this and I woudl always replace the wires and motor (with stock motors) and it would start fine, maybe slight hesitation but still start up after one or two rotations.
How many times now have you used a car/larger vehicles battery for jumping? Did you remember to disconnect the battery before hooking the jumpers and did you disconnect the jumpers right away and reconnect the battery? If you don't disconnect the battery you damage it as soon as you hook up those jumper cables, even if you do not try to start it, even if it's just for a second or two, it will cause damage. I have seen many scooter batteries die because of hooking them up to car batteries. The plates in them start drying up and warping immediately, sure you can be super careful but you can't be faster than electricity can you?
|
|
