260 Head Pipe on 300?

[mcman56]

Has anyone tried a 260 head pipe on a 300.  It looks a good bit smaller and I wonder if it would soften the response.  I would like my 300 4RT to run more like a Beta 300.

[Tr1AL]

2 hours ago, mcman56 said:

Has anyone tried a 260 head pipe on a 300.  It looks a good bit smaller and I wonder if it would soften the response.  I would like my 300 4RT to run more like a Beta 300.

If you want less performance to soften response you need a wider bore  pipe not a smaller one , this decreases back pressure and therefore lessen low end torque that makes for instant action off the bottom. Its complicated on a four stroke motor. I would recommend you read up on it before trying any amateur tuning tweeks. Honda 4rt with a BETA 4t motor grafted in?

Send a message to BANYERES perhaps he may have something to help you get what you want.

Edited 20 hours ago by Tr1AL

[lemur]

There are an assortment of restrictors available to detune the 4RT all the way down to ~125cc performance ( learner license ). one plate goes into the intake and 3 are available for the exhaust including a different tailpiece that can be riveted on the tail end of the muffler.   ... if you really want to detune one it's not hard, the fuel injection will even sort itself for everything except idle screw setting.

[jrsunt]

I’m not sure you will get a Mont to feel like a Beta. The injection vs carb response is very noticeable. Mapping would be the way to do it, getting hold of a HRC (fully programmable) throttle body may be impossible though. 

But, it has been done before with various header pipe set ups, there were some posts on here a few years ago. It would be worth a read.
I think the standard 250 and 260 header is 26mm and the 301 is about 30mm. There should be plenty of standard 250/260’s available second hand fairly cheap. The 250 pipes did change around 2009 they are slightly longer to accommodate the newer style silencers. Aftermarket headers are about 28mm. Getting the right gasket to fit the combinations might be tricky. 

Edited 15 hours ago by jrsunt

[jrsunt]

 

[Tr1AL]

hanson racing on Facebook sold one on their ebay shop UK for around £450.00.

Edited 10 hours ago by Tr1AL

[mcman56]

17 hours ago, lemur said:

There are an assortment of restrictors available to detune the 4RT all the way down to ~125cc performance ( learner license ). one plate goes into the intake and 3 are available for the exhaust including a different tailpiece that can be riveted on the tail end of the muffler.   ... if you really want to detune one it's not hard, the fuel injection will even sort itself for everything except idle screw setting.

Where can you find these restrictors?  I have found nothing.