Scooterotica

I running a mugello 186 on a 25 mm PHBL dellorto and just changed from an ancilloti which ran fine to a bgm clubman (ancilloti didn't fit right , bracket snapping etc. muggy problem solved for me by this forun ) .....and it doesn't seem to rev out now. It is fine up to 65 and then it just hits a wall feels like it is dragging, running with a 105 main jet although I might up this a bit and see if it performs better. If not I am going to try a 28 mm dellorto and see how that goes but I was told there is a problem with the BGM clubman exhaust revving out , anyone had this problem?

I ran mine with a 26 but changed to a 28 and it revs out fine, had it sorted on a dyno. Is your clubman secured to the bottom of the crankcase?

Yes secured on bottom of case , changed carb tonight to 28mil , changed plug, lead,CDI and HT lead tested the stator and it is ok, but scooter is still not revving out ,Great up to about 3/4 revs about 60-65 then it feels like it is breaking down and starts to slow and drag if I try and rev on.

i am running a 118 main jet on 25mm and a 128 on 28mm dellorto. same exhaust but 200cc cast iron, well portet with reed. i guess you are running to lean. give it a try.

Was running the 25mil with a 105 main and now running the 28 with a 118 although I think this is running rich rather than lean but I''ll will rejet tonight from 105 upwards. Hopefully this will sort things out. I can try a PM pipe although specifically want a box pipe. I had not heard of a problem with the BGM's but was told last weekend by a well known shop owner that they don't rev out. Hope this isn't another expensive doorstop especially as I went out my way to buy the correct swan neck as the ancilloti and an indian big bore both snapped at the bracket (a known mugello problem)

Wow 105 does seem smail I running a135 on a 22mm carb on a 200 whats the rest of your jetting like does your choke seat fully I only ask as someone I know had one that didnt and he had similar jetting to yours on a 200

Mines a 105 mj ...I'm not an expert but it could be your gearing....

pilot back down to 50 from 55 X2 needle top clip and main jet down to 108 , seems to be fine now but will plug chop and check over the next few days. Thanks.

I would as you just went leaner on idle, mid range and top end all without plug chopping each one individually

I have a 105 on my rt225 with same clubman amd 28 phbh.