The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: 67siia on April 09, 2015, 02:13:49 PM

Title: 79 R65 exhaust diameter
Post by: 67siia on April 09, 2015, 02:13:49 PM

Stock pipes, I'm ordering slip on pipes I meassure 35mm is this correct? I'm questioning because the supplier offered the 44.5mm with reducers... Just wondering if I messured incorrectly the

Title: Re: 79 R65 exhaust diameter
Post by: Barry on April 09, 2015, 02:36:46 PM

35mm is correct.  Other airheads are 38mm with some R100's 40mm.

Title: Re: 79 R65 exhaust diameter
Post by: 67siia on April 09, 2015, 04:23:53 PM

Barry, cheers!

Title: Re: 79 R65 exhaust diameter
Post by: castledener on April 10, 2015, 09:22:29 AM

I've just fitted some short "silencers" made primarily for British bikes.They came with 3 reducers,they didn't grip the exhaust pipe,looked ugly too,then I found some reducers,on ebay, stainless 100mm long 35mm inside dia stepped up to 41.27 mm outside dia.The silencer fitted perfect the exhaust pipe side I had to slot with my dremel.The overall fit in my opinion is good,the sound awesome.They come in different sizes tooThe pair for £18. free P&P.I'll post a couple of pics if anyone is interested

Title: Re: 79 R65 exhaust diameter
Post by: 67siia on April 10, 2015, 09:42:47 PM

Pics please and if possible the eBay link.  

Quote

I've just fitted some short "silencers" made primarily for British bikes.They came with 3 reducers,they didn't grip the exhaust pipe,looked ugly too,then I found some reducers,on ebay, stainless 100mm long 35mm inside dia stepped up to 41.27 mm outside dia.The silencer fitted perfect the exhaust pipe side I had to slot with my dremel.The overall fit in my opinion is good,the sound awesome.They come in different sizes tooThe pair for £18. free P&P.I'll post a couple of pics if anyone is interested

Title: Re: 79 R65 exhaust diameter
Post by: castledener on April 11, 2015, 05:05:23 AM

I'll try to post a couple of pics.The dimensions I gave should have been 35mm inside dia and around 44 mm outside dia.ebay (UK) item sold by everyexhaustpart item number 131261459312.I polished mine with wire wool grade 0000 and metal polish,really good finish

Title: Re: 79 R65 exhaust diameter
Post by: castledener on April 11, 2015, 05:08:42 AM

If it would help I could buy a pair of reducers and ship them to you at cost.Regards Neil

Title: Re: 79 R65 exhaust diameter
Post by: 67siia on April 11, 2015, 12:06:23 PM

Castledener much appreciated. I'll go to my local exhaust shop and buy a 3mm sleeve. I would expect it to be only a few $.