18 replies to this topic

[Agus1601]

If it is running really rich then possible issues on HS4 are:

- main jet not returning fully up when choke pushed in

- float chamber needle jet not sealing off

- incorrect main jet level

- worn needle (swing type)

- incorrect or modified needle

- badly clogged air filter

Thank you very much for the information, I would like to know how to manage to understand every bit of those problems so as to make some changes

 

Do you have any guide of steps to make it easier for me?

 

Thanks

[Wiggy]

I can check it out again if you want to, and also was thinking of buying some new ones, but would like to do some twerking on my carb to get it perfect

You must have good balance. Heh heh heh.

[carbon]

 

If it is running really rich then possible issues on HS4 are:

- main jet not returning fully up when choke pushed in

- float chamber needle jet not sealing off

- incorrect main jet level

- worn needle (swing type)

- incorrect or modified needle

- badly clogged air filter

Thank you very much for the information, I would like to know how to manage to understand every bit of those problems so as to make some changes

 

Do you have any guide of steps to make it easier for me?

 

Thanks

 

Here is the tuning advice for single SU from the manufacturer: http://sucarb.co.uk/...r-tuning-single

 

My other points are for troubleshooting in case of excessively rich mixture.

[Agus1601]

Yesterday I made my car run much more eficent and have no rpm glances, it keeps on reving at 1000 rpm. Now, when I push hard the accelerator the car goes well until 3200rpm, and then it goes very slow.

 

I also did some work on the valves, giving them 0.012 of valve clearence, it was in 0,20 it runs very smoooth now

 

I have a video, will upload it here

 

https://drive.google...oGVziVm7r8wzSHz

 

Thank you all guys!