I have a 03 Beta Rev3 and if I blip the throttle in neutral the engine revs take forever to climb. The bike has got the white throttle tube, so it's not that.
Plenty of compression - I even struggle to kickstart it with all my 75 kg sometimes (could this be a sign of something wrong?)
Starts easily though with choke on and idles well once warmed up and the choke off.
New spark plug set to 0.6 mm.
New fuel mix.
Cleaned out the carb.
I took it to the local Gasgas agent (just because he is close by) who said "that's just the way they are".
I compared my Rev3 to a 06 Gasgas Txt 280 and the Gasgas is soooooo quick to rev!
Is this Just the way the older Betas are?