neil king

Dan, any luck? I've worked on these carbs a little. It's the same As on the new 4t. The first thing I do to on the new ones is to install a Jitsie remote fuel screw. I had an '08 4t but did not have to pull the carb or change anything. There is very limited info out there on this carb. I found out a little about them from a 4 wheeler forum as the Yamaha Warrior used the BSR before it went fi.

The drain plug is not rocket science. I just snug it up good and not overtighten it.

I'm at about 400 ft above sea level. And I did have to lower the needle. I'm pretty sure I had to lower it by slots.

If a 2 stroke motor is run too cool for an extended period of time carbon builds up and causes piston an cylinder scoring. Also causes the rings to stick for excessive blowby.

I can't ride mine on the fast map. Almost killed myself.

Badass lookin bike! I got a 300 ordered. I'll order a 300 4t and a 250 2t also.

Is your fan thermostat bypassed?

When its hot outside the 4t fan rarely shuts off.

Some Betas suffer from a loud primary. The gears mate a little loose and create a knocking sound. This is better than too tight which causes gear whine. I don't know what gear oil you use but if you try a heavier oil and it quiets it down some than this is your noise. It doesn't hurt anything it's just annoying. The Evo's seem to be quite a bit better about this than the Rev's

What year is it?

Mobil1 0w20 will fix clutch drag and make shifting easier.

The 250 is a great bike!

I'm talking about his first post not his wishwashy 2nd post

I fully agree with every word Sting32 said! well, most of them anyway.

That site is too complicated for me to figure out.

From what I've seen, thats normal for small displacement bikes.

I put some on an '11 290 just the other day with no problem. Try holding them at an upward angle, you have to push against the spring but I bet it will work for you.

Part # AB-21081 on the American Beta web site. Yes it says it's for an FCR Kehien but it works fine on the Mikuni BSR.

It's a BSR 33-79. There's not much info out there on them but some Yamaha big bore 4 wheelers used them.

The R& D remote screw works great on the 4T

Do yourself a favor and get the R & D remote screw. Its for an FCR but it works fine in the BSR.

The new 80 Sr has a black front fender and is the same as a Rev.

Sounds like you need the 8.4kg spring for the rear and at least the .88kg front spring for the front. I went with the 8.2kg rear and stayed with the stock front . I weigh 13.57 stone.

I had no problems with the clutch on my 2011. But lots of trouble with the 12 for the first few weeks, till I took a saw blade to it.

Dan, in 2012 Beta changed the outer most and inner most fiber plates. They are a little thicker and the cork is a single peice per side. The groves between the pads are very shallow. You have probably seen them by now. I found that a hack saw blade works well on them.