Darrinster

I think I'll do the synthetic blend and then go full synthetic. Just purchased a 1987 Big Bear.

Thanks for the information! Just bought my first real ATV and still learning.

My Big Bear is an 1987 I don't think they changed much.

Thanks for the service manual!

I had to lower the idle on my Big Bear as I couldn't shift back and forth from neutral and reverse.

So far the 1987 Big Bear I bought was worth the money. Hope to have it for a long time.

Just bought one of these, this will come in handy in the future thanks.

You could try an aftermarket carburetor. I bought one for a Yamaha 125 dirt bike and it ran great. I also recently just bought a Big Bear. Finally got it running today as it had no spark. I've heard they're good ATV's long as you keep on the maintenance. Good luck!

Did you try a different spark plug? Do you have spark tester? New or used parts?

Did you buy an aftermarket carburetor? Those Chinese carbs wont seat right and will leak like crazy.