So my brother has a 98 rm250, the issue with the bike is when you get out of the pipe and then hammer it it breaks up for a second. I have played with jetting, cleaned the heck out of the carbs and power valve, adjusted the power valve. Now the suzuki recomended plug is a $28 ngk(LOL) part number R6918B-7 we have been running the BR8EG. Any Ideas?

Try a br8eix iridium. How the packing in the silencer. Has it ever been changed? It can cause problems.

have you done a plug chop? that will rule out jetting.

alf44 wrote:

Try a br8eix iridium. How the packing in the silencer. Has it ever been changed? It can cause problems.

x2 on the plug, I ran that in my kx and it made a noticeable difference.

Ive got alot of people to change to these plugs. Even some of the die hards that swore by theres only. I can get them a few bucks cheaper than your local dealer to. I try to order a few every time I order something from this particular vendor.