2018 Massimo 177cc grinding noise

[TimothyLindblom]

Hey all, I just picked up this Massimo UTV for $500. Got it home and replaced the starter solenoid which successfully got power to the starter. Starter spun but engine didn't turn over although the engine is not locked up. I thought it was a bad starter. Got a new starter put on today and it does the same thing. Pulled the clutch cover and saw the engine is trying to turn over but something is slipping and not letting it turn over. I figured it must be the gear on the engine that the starter turns. Where can I get that and can it be replaced without pulling the motor? And am I correct that that's the issue? 

Thanks!

Short video attached below

 

[TimothyLindblom]

Pulled the new starter back off to check out the gear it spins and that little gear is in fine shape. Obviously something else is stripped out but I'm not sure what.

[TimothyLindblom]

Looks like I need a new starter clutch. Got it torn apart and will order a new one tonight. Will update if I get it fixed

[Mech]

Yes it sounds like the sprag clutch is slipping. Those often come right with a good wash. The tiniest bit of metal dust is enough to make then slip..

Did I say metal dust.. !!

[TimothyLindblom]

Yep the starter clutch was shot and the 3 allen bolts holding it together were stripped out and the whole thing was loose and falling apart. You need a special socket to remove the nut holding the clutch on. I didn't realize until it was too late that the nut was a left hand thread. I either stripped out that nut or the crankshaft 🙁

[Mech]

Dang...

[Gwbarm]

Thats bad news. I hate it when that happens. I have fixed many cranks with bad threads, first i get the correct die for the threads on the crank and try that first, it will work if it hasnt obliterated the threads closest to the engine and if it has i have gotton away with using an extra washer there to keep the nut from getting on the area with no threads.

[Mech]

You'll have trouble getting a left hand thread die though quite likely.. There's a thing called a "thread file", that's what you want.. It'll cut whichever you aim it. They come in different threads but you'll probably only need one file and the eight threads it does will do everything on the bike.

Other than that.. What Gw says.