betasweden

I’m experimenting a little bit on that. Right now 1->2 turns out.

I maybe have one laying around. Need to check. But im from Sweden..

haha

I did remove the air filter last night and it was an huge difference. No misfiring almost. But was a little bit “slow” on low register instead. Also I removed the sparkplug and saw it was weary black. So I will check my Main Jet and fit a 130 that I have. (Think I have 137 now..) I know I have used the 130 before but wanted to go up to 132. But the seller did only have 137 so I took that. But can’t remember why I wanted to go from 130 à132 (137) Maybe a 130 and calibrate with mixture screw more will work? Let me test! J

It will be my first test tonight!

haha been riding 300 2 Stroke for many years! But the Beta importer wanted me on a 4 Stroke this year

Thanks! Then i can say its not an good bike for an more expert rider. I hit that rev limiter every practice. .. Other wise it runs really good!

The bike is almost new. But is there any RPM stop on them?

As i stated, it has always been this issue. And the bike comes "lean" from factory. So you need to change from the beginning. Dose not run good at all from Factory.

Yes, i know... But i did go bigger and bigger. And stoped at 137. Could probably go back a bit. But runns ok now. And its not that fun to change on the 4T.. No, Bosi only have an exhaust pip for 4T. Not full.. But should not misfire on high RPMs any way?

What is an header pip? I have now an Bosi exhaust. But this problem was even before i changed.. Think Main is 137,5 right now. But this issue on high RPMs has been sens new

Sorry, Standard 2017.

Hello It has always been this problem. Dont think it has to do with the jets. Dose not sound like that.

Hello, Seeking help with this issue. My 2017 300 4T is running great. Except for one thing. On really high RPMs the engine misfire. Like an Enduro 4T. Really annoying when you need to have high RPMs on a big step with short run up. Is in any kind of "RPM stop" on them? I have changed, jets etc.. Thank full for all help!

Thanks! I did also drain the bike of some oil last night. So now its perfect i think!.

Hello, Many thanks!!

Hello, Ok, thanks. I dont follow your link? https://www.yamahamotorsports.com/off-road/models/yz250fx

Hello, Thanks! Do you also know this? I can see two that could be plugs as well on the front if the engine. Below the exhaust pipe. What are these for??

Hello Ok, then I have to drain some oil tonight. And have an eye on the glass instead. One more question. Is there only on drain plug on the engine? (under) I can see two that could be plugs as well on the front if the engine. Below the exhaust pipe. What are these for?? Thanks!

Thanks! What is the correct amount? Seems like instruction manual should be correct with the amount of oil?

Hello, Thanks for the information. When im checking other language I can see it not the same. Filters and everything im aware about. No problem. As well as the oil. However, lineaway says 700 cc is enough oil in the engine. But instruction says 900ml? Filled up the engine last night with 900ml. But I could see that the sight glass was overfilled quickly? What is the correct amount? Seems like instruction manual should be correct with the amount of oil?

Hello, When im reading trough the instruction manual for my Beta Evo 300 4T -17. I have noticed that under “Recommendations Lubricants and Liquids” It says: ENGINE OIL - LIQUI MOLY RACING SYNTH 10W50 GEAR AND CLUTCH OIL - LIQUI MOLY RACING 4T 10W-30 Does anybody know anything about the "Gear and Clutch oil"? It does not say where and how to change? Br/ Daniel GEAR AND CLUTCH OIL.pdf

Hello, I have not fitted the Bosi Arrow exhausted yet. But people say it should be better and also better sound.

Hello, I changed to the 130 Main this weekend and work much better now! Thanks! The 27,5 jet was already fitted from factory. So only one needed to be changed. (Nothing with the needle) I have not fitted the Bosi Arrow exhausted yet. But people say it should be better and also better sound.

I have ordered an 130 Main and a 27,5 jet. Really hope i will have them before the weekend. Will let you know how it runs after. Thanks, for your help!!