Yoshi R77 with stock system ok ?

[Tierhog]

Flash ECU? JB. O2 mod necessary ? Green filter

Any "stock" success stories?

[arntufun]

The best advice is to put the pipe on and ride it. Some do not need anything added and some do. If it backfires when you let off the gas, then you need to add a juice box.

I run a 02 mod on mine and that corrected the backfire, but the company is no longer in business so it might be tough to find one.

[boborgera]

Like arntufun said , Ride it then if needed add the juice box.
Just go one step at a time.

[SPYD1]

Talk with Bajaron as he has one.

[Tierhog]

I'll track him down....