Just thought I'd mention that I used those little buffing wheels to clean my fishing reel. It wouldn't cast. I tried oiling it and replacing the line but still wouldn't cast. Then I noticed little worn spots that was snagging the line so I hit them with the buffing wheel and it casts like new.

I'm not sure what constitutes a mechanic if facts are merely opinions. Anyone can identify as a mechanic and take people's money. Mechanics and professionals in general typically have the reputation of politicians for being unable to fix issues while charging way too much. I myself have fixed things the wrong way and have been paid and celebrated for fixing it, but it was still wrong. Just because I get paid and have happy customers doesn't mean I'm a good mechanic. Being a good mechanic is an on-going learning process in my opinion. Anyone who thinks they know it all is to be avoided. Times change and accepted practices change and you have to keep up with changes. I couldn't tell you how many times I lapped a new valve into an old seat and everyone thought I was a great mechanic. Then a year or so later the failure was blamed on a bad air filter or something. No one ever questioned my workmanship even though they should have. How were they supposed to know? It takes a good mechanic to know a bad one. That quad that we flipped we just broke even on cost just to get rid of it. But there would have been no way anyone would have paid the necessary money to have us fix it right by replacing that rod bearing. That job would not have been worth it. So it's better to scrap the quad and start with something else. But generally speaking I'd prefer to fix old things than buy new because usually the new things are crappy quality. It just depends on what we're talking about. We're just talking I think. Pretty civil so far. That's good news. They are fairly durable machines. The weak links are the intake valve and regulator. And speedo cable. There are mods you can do to get the front diff locked in any range. I forgot how but I know it's possible. Also a mod to start in any gear.

Yeah well I'm a mechanic and I manage to overhaul things for an economical price for people.. My customers don't think it's a waste.. I don't like the idea of scrapping things just to go buy a new one..

I bought a basket of internal parts for a 230 back in 2007 ish with the intention to replace the 4th gear, but ended up replacing the 230 with a 250 engine instead, and the 250 already has the 4th gear fixed. That was the same time I was going to send the crank to Vince. After 15 years there's no hope that engine will ever go back together lol. But I'm sure I still have the crank. I could see how tight the fit is. It's just hard to imagine that it could balance itself. I understand that people upsell themselves to make money but I talked to Vince 2 hours and didn't get that impression. He seemed about like Mech: a dude that just wanted to help people. You could probably call him now and see what he has to say about all this. But regardless I'm not going to go to all the trouble to pull an engine, split the case, split the crank and buy all the parts to replace a rod bearing. And if the rod bearing is shot then other things are probably worn too. If the rod bearing is shot then the whole quad is a money pit. That was the main point of all this. Alternatively if I'm building a racer then I would send the crank off anyway just to be sure it's done right. It doesn't cost that much. I think it's only $50 plus the parts and shipping.

The gearboxes are simple too.. Most manufacturers design their gearboxes these days so it's almost impossible to get them wrong. All specialists tell people that they need their help, and that there are dangers involved, and that paying more and getting them to double up on things is the premium way of doing it.. There is a lot of bullshit and pandering to people's vanity involved in a lot of it... I've seen it and been inside it.. It's why I became self employed.. I always advocate that people should have a go at fixing things themselves. I've always been willing and happy to give my time to anyone that wanted to have a go themselves. In the mechanical field, there's nothing that somebody else can do that we can't do with training and care.

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A lot of people use lights and heaters so I thought it had something to do with temperature but it seems to me more to do with with day length like the trees and flowers that are blooming already. And the geese always lay in January when it's the coldest. I've hatched a couple geese before. Temperature controls what sex they are.

I'd check the engine, frame and the negative terminal of the battery are all properly connected by their respective earth wires.