burns1989

Hi all does any one if you can take the head off a 08 rev 3 250 whilst the engine is still in the frame. Thanks

Sorry been on holiday had no signal all week, glad some one picked up on it thanks. Yeah doesnt show on the parts diagram but is on most keihin carbs with the security screws. Daft really how hard they are to obtain.

Hi all though id share this to help others trying to sort out fuel mixture problems ect. If you have a keihn pkw carb and your plug is showing rich mixture black sooty, it may be worth replacing the center gasket which has the two security screws. Other symptoms is now power band at all and the pilot screw makes no difrence when turned. I had this exact problem and put new gasket in and transformed the bike.

Ok I gues so, i moved timing back to standard which gave it a good strong torque and instant power from just touching the throttle, dont really like a muddy feel as I like sharp throtle responce, Id agree the 10 tooth feels like you cant stall the bike easy and will lift the front wheel no probs when you want it.

Hi all can any one shed light on this, my 08 rev 3 250. Previous owner had it set up like thus Ignition timing was fairly retarded by 5 degrees I'd guess Needle jet is a JJJ not the JJH standard size. Front sprocket is a 10 tooth Found the time due to the bottom end going and having a rebuild. I can only guess they wanted a very soft engine. On second note my m8 has a 2001 modle which seems to have more grunt and power than mine on a speed test he pulls way and leaves a fair gap even if we get away the same time ect.

Im Just going to go with a matching cases number as I can see any modifications been done on it. Thanks for your replies

I gues so sir, any reason they would mark the cases? Other than not fitting wrong case half's

Got my 08 rev 3 250 apart for new mains and crank. After splitting the cases I found markings engraved 1064. Does any one know what this would have been done for. Its obviously the engine has been apart before as the new mains uv had are the plastic caged ones direct from beta. Old bearings were ntn.

Where did you get the jet blok gasket ?

Got it sorted now and for others here is the adjustment

Hi all iv tried looking in google and the links dont work, So does any one know how you set the ignition timing on a 08 rev 3 250, I did mark up the stator plate but it looks some one e has advanced the timing as the bolt holes have two witnes marks. Any help is appreciated

Got it sorted thank you m8

Rebuild the master cylinder the kits are 30 quid and not hard to do at all

Hi all foes any one have a 2008 beta rev 3 250 crank and magneto lying around thats in good condition,mine has been mullerd by prviose owner and unfortunately they arnt available new any more, thanks

Good evening, got my 2008 rec 3 250 engine out for rebuilding, iv noticed the two crank case half are a difrent colour to each other ones a dull grey and the other is a darker but more shiny grey, not sure if the one half has been replaced in the past but my hope is not as the cases are macheaned together as a pair. Can any one shed any light on this thanks