Tb88rh final tunning

[doyle#23]

Hey all

Rode the crf50 today for an hour (first good ride) happy with the running but two things I'd like to address

1) idles been turned up a little but in isn't stable, idles low then crack the throttle and it stays up abit higher and slower drops back down (pilot is #32)

2) sparkplug is black with soot (not oil) main jet #90

Carbie is a keihin 20mm. Think I should dropped main jet back to a #87 to fix problem number 2?

Thanks guys

Doyle

 

[domotox]

Did you get this sorted mate.
If you drop it back to 87 it Should fix both problems. The idle staying high and then dropping back down suggests to rich.

 

[Gerro]

I have the TB 88cc RH as well and I have similar conditions to yours

My setting are:

#90 Mainjet
#35 Pilot (Stock)
Needle clip position is second from the bottom
Air screw is 1.5 turns out
Running a Dr.D exhaust

I also have a low end bog that will stall the engine if I crack the throttle and hold it on, kind of like the engine is staving of fuel. I mainly notice the problem when the bike is in neutral, there is only a slight hessitation present when riding. If I use a bit of choke the bog goes away so I believe the pilot is a bit lean. I have check the plug a few times and the end has always been a sooty black.

I am going to order a set of pilot jets and see how it goes with a #38