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Post by nemo04660 on Jun 18, 2017 23:26:12 GMT -5
Just got a Boom 50cc trike and was going over it not sure what variator i have, I have not seen one like it in any videos i am new to scooters so dont be harsh   |
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Post by jeff84 on Jun 18, 2017 23:35:51 GMT -5
looks pretty standard to me
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Post by nemo04660 on Jun 18, 2017 23:46:19 GMT -5
Some seem to have the fans but no gear / sprocket if that makes sense is it part of the kick start?
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Post by nemo04660 on Jun 18, 2017 23:55:30 GMT -5
Some seem to have the fans but no gear / sprocket if that makes sense is it part of the kick start?  Is this before the sprocket is on im new to this stuff |
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Post by dan50 on Jun 19, 2017 0:02:35 GMT -5
If you have a 4t (4 stroke) engine, that looks like a 139QMB standard variator. The teeth are for the starter motor to engage. Some buy variator's without the teeth and do away with the electric start (kick start only).
I have a varisror locking tool that bolts onto the CVT case and locks the variator from moving using those teeth. It's a handy tool to make getting the variator loose easier, and I also use it to keep the engine from moving when doing a BBK (Big Bore Kit) install.
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Post by dan50 on Jun 19, 2017 0:08:49 GMT -5
Nobody's going to be harsh on you for being new to scooters. We were all Noob's at one time.
I learned so much from the other members of this site sharing their knowledge. The Tech Section also has a wealth of information and video's about working on a scooter.
I'm not a mechanic, but what I learned from this site and watching video's in the Tech Section, after a couple of times taking the CVT apart, I can change a set of rollers and have the CVT back together in 20 minutes. I just did my first BBK install and it was a LOT easier than I thought.
Welcome and Happy Riding,
Dan50
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Post by gsx600racer on Jun 19, 2017 0:10:17 GMT -5
looks pretty standard to me +1 ^^^^^ |
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Post by 90GTVert on Jun 19, 2017 5:36:23 GMT -5
Welcome to the forum!
Looks like a 139QMB (sometimes called a GY6 50) CVT from what I can see. 669 18 30 belt is common for short case 139QMBs.
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Post by nemo04660 on Jun 19, 2017 6:35:48 GMT -5
Thanks
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Post by nemo04660 on Jun 19, 2017 8:21:12 GMT -5
I must have been watching videos with out electric start makes sense now thanks again now if i ever get my wheels the never sent me I'll be good
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Post by 90GTVert on Jun 19, 2017 10:13:56 GMT -5
The screenshot from the video that you posted is a Minarelli style two-stroke engine. Also popular, but not what you have.
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Post by Senna1Rossi on Jun 19, 2017 16:03:28 GMT -5
Welcome.
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Post by nemo04660 on Jun 19, 2017 22:28:16 GMT -5
Again thank you all i joined another group and was not treated as nice as you but dan50 where did you get that tool have been looking but cant seam to find also any sites that are good for parts and tools would be great i know a little about engines but this clutch is all new to me thanks
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Post by nemo04660 on Jun 19, 2017 22:48:01 GMT -5
Again thank you all i joined another group and was not treated as nice as you but dan50 where did you get that tool have been looking but cant seam to find also any sites that are good for parts and tools would be great i know a little about engines but this clutch is all new to me thanks
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Post by dan50 on Jun 19, 2017 23:18:18 GMT -5
Again thank you all i joined another group and was not treated as nice as you but dan50 where did you get that tool have been looking but cant seam to find also any sites that are good for parts and tools would be great i know a little about engines but this clutch is all new to me thanks 4 stroke Variator locking ( the 2 stroke is different) tool on Ebay; www.ebay.com/itm/Variator-Holding-Locking-Tool-for-GY6-139QMB-50-100-Scooter-Moped-Variator-/272281016924?hash=item3f65369a5c:g:PekAAOSwepJXaP0X&vxp=mtrThis one will fit your motor and is cheap for what it does. For the clutch, I use 3 - 12" long clamps with the rubber ends. The contra spring is under a lot of pressure and if you don't contain it, it will go through the ceiling (maybe). To open the clutch, use all 3 clamps, about 1/3 the way around the clutch, loosen & remove the nut, then back the clamps off taking turn a little at a time until you feel the pressure is off the spring. To install, line up the clutch cover with the bottom 1/2 (there is a flat side to line up), then squeeze the clamps in turn to bring the cover down so you can install & tighten the nut. For a scooter, you don't need very many special tools. The other tool I can think of is a flywheel puller (in case you need to change the stator); www.ebay.com/itm/221549606858Scooters are easy to work on, take your time and it's a lot easier than you think. Glad I can help, Dan50 |
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