Keihin Silencers and getting them to fit

bclark

bclark

Senior member
I have a pair of Keihin Silencers which I have planned to fit to my triple for a while now. When I bought the bike it had an aftermarket 3 into one fitted but came with the original down pipes and collector box as spares (no original silencers) - shortly after I picked up the Keihins.

I have removed the 3 into 1 and fitted the original downpipes and collector but the exit pipes from the collector (to connect to the silencers) seem too short as once connected, the silencers are too close to the rear wheel to reach the standard mounts.

Has anyone had experience of this? - do the keihin silencers not fit directly on the standard exhaust?
 
Keihan silencers should fit fine. Although, if you haven't done it before, fitting a triple exhaust system can prove tricky.

First thing is to make sure you have the right downpipes in the right position - all three are different. If numbered, The one ending in 42 fits in the middle, ending in 40 on the generator side and ending in 41 on the primary side.

Fit them loosely, but not too loose, then fit the collector. At that point, offer up the silencers. You now have the ability to shift things around a bit to make them fit.  If, at this point, you still can't get them to join, some of your parts are probably wrong parts. With the correct parts it should be an easy job and take no more than 20 minutes.

HTH

Pete
 
If there is anyone out there with a circa 1980 Jota can you tell me the distance (under the bike) from the very front ie. collector-box-end of the silencer pipe to the inner fork of the Y of the collector (ie I'm interested in how much of the collector box rear pipes are exposed before they go into the silencer)..

 
Hi Poffer - the part numbers matched with the down pipe numbers you gave and they were in the correct sides but it was confusing as to why the silencers would get close to meeting the collector outlets. I searched the internet for photos and found that...

My 3 into one had the silencer mount between the footpeg and frame (ie. at the front of frame) which is where I put the extra mount for the extra silencer on the other side. From photos it looked like the mounts should be between the footpeg nuts and the frame (ie behind the frame).

I swapped them over to this arrangement which moved everything closer and all aligned fine..

Looks a bit weird to me now with the chrome downpipes and stainless pipes. They also look way more exposed that the old 3 into 1!

 
Hi Brian,

Does that mean you're sorted?  If not, let me know and I can do some measuring tomorrow. Just drop me a PM.  My Jota is 1977, but all the 180s are the same for exhaust fitting.  Once you have worked it out, it is pretty simple.

Cosi - if it's taking a couple of hours, your taking too long down the pub for lunch  :P

Pete
 
Yes all sorted - the seem to be pretty even both sides but I'll have a last check in the daylight tomorrow.. cheers Brian

 
Chrome downpipes with stainless is better than the other way around,stainless just go brown,the blueing of the downpipes in chrome is far nicer,rechrome them if the are old.My Keihan silencer cracked due to its nature,same can go for the collector box,but Keihan replace no q"s asked with there 10yr guarantee

Shaun
 
          Best buy Malcolm Cox's cromed steel silencers, an immaculate fit, and a much better sound than

          stainless, no affiliation, just very pleased wih mine, l'll be buying another set for my project

                                      eric
 
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