Jetting with baffle in?

[oldoffroader]

sorry its another jetting question, but here in the uk noise is a big problem and i have to run with the baffle in, can you still use the power up jetting sizes or just leave it standard?

[FATHER AND SON CRF]

I do not know. But what is the decible limit there. I have posted elswhere how much I like the mod of drilling out the end cap on my stock baffle. I drilled it out to the full diameter of the baffle tube. It is a little bit louder and flows so much better.

[oldoffroader]

96db at the moment but will get lower

[FATHER AND SON CRF]

drill that baffle out man

[bits 50]

drill that baffle out man

I agree. The bike is still pretty quiet with the baffle drilled out.

[Crf230 Rider]

That was my suggestion, drill a hole in the baffle. Quiet and should have a lot of low-end.

[oldoffroader]

do you mean in the end of the baffle which is sealed

[FATHER AND SON CRF]

Yep, drill out to the diameter of the inside of that tube.

[ramz]

Check it out:

CRF230F Modifications

Scroll down to the sixth panel; click the picture to supersize.

[oldoffroader]

cheers, just noted our noise levels are 94 db not 96db

[FATHER AND SON CRF]

Check it out:

CRF230F Modifications

Scroll down to the sixth panel; click the picture to supersize.

Right on, thanks for shooting him that pic. I thought you had one.

With tight noise restrictions you might want to start with just the hole where he has the drill into it. Later if you want to hit it from the side also you can do that, like where he just has the bit in the hole.

[oldoffroader]

will get the drill out this weekend will let you know what i think of the results

[bits 50]

will get the drill out this weekend will let you know what i think of the results

You'll like it. I did it to my baffle and it works and sounds sweet.

[oldoffroader]

You'll like it. I did it to my baffle and it works and sounds sweet.

driled out today seems good, only had the chance to try it up the drive, but racing in an hare and hounds next week will post thoughts then (if i pass the noise test)

[oldoffroader]

wow what a difference went round the course today prepping it for tommorow and this has put the power just where i want it in the middle of the range, all the mods i did before was at the top end where the power was falling off, will let you know how the race goes should suit the 230

[bits 50]

wow what a difference went round the course today prepping it for tommorow and this has put the power just where i want it in the middle of the range, all the mods i did before was at the top end where the power was falling off, will let you know how the race goes should suit the 230

I knew you would like it, alot cheaper than an aftermarket exhaust too.

[FATHER AND SON CRF]

I knew you would like it, alot cheaper than an aftermarket exhaust too.

Ya, so I got drilled baffles in BBR pipes. Huh, maybe some money did not need to get spent. Sheet, that was almost 600 bucks

[oldoffroader]

race went well today had a cracking start, till i bottomed out on a log, bike went well apart from being a bit fluffy right on the bottom end, dont know if this would be either air screw or pilot jet any ideas? just gave the impression it was missing low down!

[bits 50]

race went well today had a cracking start, till i bottomed out on a log, bike went well apart from being a bit fluffy right on the bottom end, dont know if this would be either air screw or pilot jet any ideas? just gave the impression it was missing low down!

Did you open the air box and re-jet?

[oldoffroader]

yes airbox opened up and rejetted air screw 1 3/4 turns out, 132 main 45 pilot