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Post by czmdiver on Aug 8, 2018 5:59:54 GMT -6
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Post by czmdiver on Aug 6, 2018 17:57:16 GMT -6
so it would look like this?  |
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Post by czmdiver on Aug 1, 2018 16:33:34 GMT -6
Question. is the Carb off the Original Engine?
Before you buy some jets and get into this please pull the park plug, take and post some pictures to confirm Rich or Lean.
There are some good tutorials here on this site to help you with Jetting since you've never done it before,
No this the CVK carb (Constant Velocity) is very forgiving so you would have to make drastic changes or may not at all.
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Post by czmdiver on Jul 19, 2018 17:00:38 GMT -6
Great info and record keeping. .
I heard of the Gates benefits as my Scoot was being shipped, so right from the crate she had a Gates belt on her.
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yamaha qt50
by: czmdiver - Jul 18, 2018 20:20:21 GMT -6
Post by czmdiver on Jul 18, 2018 20:20:21 GMT -6
ok - call me a skeptic. The spark is fantastic so I am having trouble getting my head around the CDI being the issue. Contact plate on this bike is non adjustable. But I am also not sure if the flywheel is original to the bike either is I gently removed the center lobe section and rotated it one set of hole CW. Marked the original location with a punch and temporarily riveted it on to try. 2 kicks and it was spinning in the correct direction. You were right it was timing. Appreciate the reply and the info. You got me to look someplace I was sure was ok. But it's correct now so I can put it back together and give it back. Thank God Thank you very much for the reply and update. You found out you can make a Two Stroke run backwards, its kinda cool really.. You kept a open mind and listened to someone with immense two stroke experience.. This is valuable information for someone with this issue in the future. Good work,,, Cheers. |
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Post by czmdiver on Jul 18, 2018 5:07:31 GMT -6
key is good. So it is a timing issue. I believe there are slots on the contact plate for the magneto. Would advancing or retarding have any effect? No you will not be able to make enough of a adjustment. I would suspect the CDI pickup, on my old Yam there was a Ohm resistance number and can be easily tested, mine had like no resistance so I can only spec;ate it fired anytime it wanted to,It kicked back so bad I broke the Kickstarter shaft in half. God luck |
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yamaha qt50
by: czmdiver - Jul 17, 2018 20:39:22 GMT -6
Post by czmdiver on Jul 17, 2018 20:39:22 GMT -6
Sir you have a very rare occasion and very cool situation were the Two Stroke Fires but then goes in Reverse Direction, you do Not have a Trans problem. Anyone who has worked with old school two stroke either Tether or Radio controlled airplanes has had the Two Stroke Start then go backwards, the old COX two strokes were famous for this. we just threw a rag in the prop to stop her then restart. Knowing this is for real I have only had one full size Two Smoker do this a Kawasaki 550 jet ski, King Factory Kawi wrench tried to tell me this is impossible until I put the Jet Ski in the water and started it, the Jet Ski went backwards in the water. The Flywheel key was sheered near a perfect 180 degrees out so she would fire and run in reverse but run like crap. You may have a bad CDI pickup and she is firing any time she wants, there should be a Ohm ressitance spec you can find and test. I had Yamaha DT400 CDI pickup go south and she fired any ol time she wanted to. Or again confirm you do not have a sheered or partially sheered flywheel key. Good Luck  |
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Post by czmdiver on Jul 15, 2018 9:24:10 GMT -6
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Post by czmdiver on Jul 15, 2018 9:22:37 GMT -6
Its already Junk.
Its only "Racing" cuz it says os on the box.
All that "Racing" Cdi is mostly fake junk, they will do nothing as far as performance on a stock motor.
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Post by czmdiver on Jul 14, 2018 16:28:36 GMT -6
Well the Lighter oil Should not have effected the engine like that But.
I dunno wer your getting recommended Oil Viscosity information and there is conflicting information even on my own scoot between the manual and a placard on the Scoot but they all are running a 10w40 Motorcycle or some a 20w40 or even a. but not much recomendo for 10w30 or worse 5w30...
You need to the the 5w30 Car oil out of there. but I don't think it will effect the running problem you have.
good luck
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Exhaust
by: czmdiver - Jul 14, 2018 8:35:29 GMT -6
Post by czmdiver on Jul 14, 2018 8:35:29 GMT -6
Imo, any other than stock would help airflow. It’s kinda a matter of personal taste... size,color & price. Just beware that a some of the universal ones are not just bolt n go. Many of them require some effort/modifications to get them to fit. Also, remember to upjet your carb after doing an exhaust upgrade. Solymar Be yVery very careful of this. The major majority of the so called Performance exhaust are all FAKE. The use nothing more than the Stock Double walled head pipe that is smaller diameter than the Exhaust Port. All these listed here are FAKEs using the Stock Head-Pipe and maybe coating it. The first thing to look for and at it the Head-Pipe. www.amazon.com/dp/B0725QNNXY/?coliid=I2LJEH9RJWUP3Z&colid=1JP15018MKWP2&psc=0&ref_=lv_ov_lig_dp_it |
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Post by czmdiver on Jul 14, 2018 7:22:58 GMT -6
Thanks for all the GREAT replies...:lmao: Well after lots of trouble shooting I found it was my main jet was too big. The scooter was running way lean and went up two sizes from what I thought was in there (which had no markings). I should have measured the orifice with a drill bit and compared to the jet kit I bought. Well the original was likely 110. Two sizes up from 110, is 1st is 115 and 2nd is 120. Well I took the 120 out and put in 110... after verifying the original was 108. Now before you say OF COURSE... Right after the jet change it RAN FINE with the 120. The high speed miss came later. I may have also had a spark plug issue. It was clear the plug was getting fouled. However unrelated and may be bad luck the plug may have developed a defect (meaning a crack in porcelain not visible or internal conductor break). I measured the plug and go zero continuity. New 110 jet installed (one size up from original) and replaced plug and it runs perfect. You may want to try other Vendor for Jets. They do go in increments of One as in the next size up from a 110 is a 111 then a 112 and so on, many Scooter vendors only carry popular sizes not all the in-betweens. Going from a 110 to a 115 is a big jump and even bigger jump the 120 |
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Post by czmdiver on Jul 12, 2018 8:27:49 GMT -6
You must start the bike and go from there.
The clutch should take No more then Two Finger easy pull. and should be able to use one finger..
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Post by czmdiver on Jul 10, 2018 10:52:05 GMT -6
itistheride.boards.net/thread/9610/long-case-short-frame-storyThe "the torque wrenched never snapped" are all over the scooter boards. This Butcher was clueless when anyone tried to help him, he overtorqued his studs over and over till it drew up the metal on the cases and could never get a base gasket to work.
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Post by czmdiver on Jul 9, 2018 20:03:28 GMT -6
Ive heard this so many times I could get rich on the torque wrench never snapped.
He's using a foot pound torque wrench for a Inch Pound Job, The Foot Pound Wrench Adjusted down so low will Not Click, only the experienced will feel a Bump. When ya have to back off so far on a foot Pound torque wrench there is Not Enough Spring Pressure to get that "Snap".
He should Not be using a Click Type Foot Pound but a inch pound Beam type till he learns how to use a Torque Wrench.
I would Never Sell a Click Type Torque Wrench to somebody that has never used any type of torque wrench before.
Over torquing that much he may very well have pulled the metal up around the studs and the Cases are Junk..
Good Luck...
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