Quote:
Originally Posted by grumpyunk
Megadan:"Did you order the cam from WGK?"
No, got the followers, the cam, the cam shaft from "Shop3876010" on aliexpress. Total was ~$30 plus tax.
The packages indicated for the CG125, but the display ad on ali indicated for a CG250 also. The cam shaft was too long, and I did not use it. I did a visual comparison of the cam lobe, and after considering the size, decided it might be better to do one change at a time. I did not measure stock lobe to the one I bought. If I had a machine shop, I could take the lobe, and remove material from the 'heel', and essentially modify the lift, but I'd rather have the cam 'fatter', to open earlier and close a bit later.
I did not do anything to the factory cam except R&R. Found that I could push the oil seal out of the way to gain visual access to set the timing. I think it would have been a real bear as I had difficulty keeping the spring/washer in place while aligning the gear teeth to get the timing marks right when putting the case back together.
Now I am muddled as I know the teeth were end to end, not meshed, and I was feeding things together... Oh. The side case carries the cam & sprocket in a pocket. You have to align the teeth as you put the case halves together.
Wish you had responded earlier so I would not have taken the clutch, oil spin filter. and gears apart on the clutch side. I did not need to do that. One filter screw got messed, even using an hammer impact. I replaced all three with allen head screws, to keep the balanced.
The hardest thing, besides timing the cam, when putting the case back together was the kick starter mechanism. One of the parts wants to move out of place, the one that rides against the right case wall. Not seeing it as it came apart, and viewing pictures online here of the re-assembly after valve failure, gave me not much to work on. Finally moved it in one direction, that allowed the kick start shaft to align, and it went together fine.
I have a bunch of pictures, but don't know if anyone would want to see them, and where to post.
tom
|
So there are a few things to note here.
1. Any cam from Aliexpress is going to be a stock equivalent replacement. You likely wont see any performance improvement. What you want from the camshaft is the exact type of cam I ordered from WGK. More duration, no added lift.
2. There are two types of camshafts made for the CG engines. The only difference is with the mounting shaft of the cam to the gear. Our Hawks use the snap ring style, which is shorter than the later purely press fit design. Sounds to me like you ordered the latter.
3. The side case does carry the cam in a pocket, correct. But you can align the teeth in place and feed the central camshaft shaft through from the stator side of the case. Not sure if you watched my cam install video at all, but a lot of this was either shown or noted verbally.
Sorry that I did not respond sooner, but I often have moments in my life where I simply don't have the time to get on here. The best thing you could do whenever going into a project like this would be to start your own thread. There are a ton of experienced people here who have taken the motors down, or are familiar with my own build that could likely answer the questions you would have had.
I would be interested in a thread on your work and the pictures, as franque stated.