125-200cc Check your float height

Just bought a RB designs modified Mikuni off a fellow forum user .
It didn't run well - felt unresponsive and fuel was evident dribbling down overflow lines when on stand . Same jetting .

Checked float level compared to near new good running Mikuni and float was too high
Tang needed to be bent up a little so that the float was level with bowl at 45 degrees .
This is unscientific but seems to work .
With carb back on the bike it was much peppier
Need to ride bike on the dirt now to test carb fully

So first point of call for tuning Mikuni to me is checking float height

I may need to raise my float height a fraction
Checking the spark plug after a ride its looking a bit lean with
470 main and 35 pilot
No bogs though and I did get great fuel economy - on My '13 WR 125 I did 85k with 1 litre left before reserve
(55 miles)
A fellow rider on a Husaberg TE 300 had to go on reserve !!

So if your economy is poor - the float height could be the issue

( BTW the reserve is only a cup size - with a bit more on other side of tank if you can get it )

I bought an RB modded TMX from another member, and had the same problem with power and gas leaking out the overflow.
Now that the float's set right, it's incredible.

Yes - I cant remember ever having such fun time on a bike .
The bottom end was amazing - for a 125 . Hill climbing was fun and it felt unstoppable - and the top end was very strong .

I really like the new WR ignition too - It feels elastic band like .
Great overrev and smoothness but with a nice hit
For trail rides I much prefer the Wr ignition to CR now - taken a while to come to that conclusion