TheWrongTrousers
Senior member
- Location
- South London
I would like to say a massive thank you to all who have taken the trouble to reply. Some very illuminating replies here and I am sure to be ok now I think.
180 Jota. Tailpipes at uneven heights
- Thread starter TheWrongTrousers
- Start date
Laverda SF
Hero member
CLEM: Sounds like you are assembling a Harley Shovel - Love it ;o)
Schurminater
Hero member
- Location
- Surrey Hills
I love the Jota exhaust system but having fitted many exhausts systems in the past and usually single handed with header colletts (half rings) dropping out here there and everywhere 
I have found the laverda system to be the hardest to get my head round and fit correctly......my longest session being three days!....crazy i know but what i found tricky was the correct positioning of the collector box which ultimately had an effect it had on the silencer levels.
I also found that once I thought everything was correct when i then took the bike off the centre stand there was an almighty clang as the stand clouted the box!..........and back to square 1 again.
Best advice i did get on here and helped me understand a little was the relationship in tightening the header clamp nuts and how it raised or lowered the header pipes underneath the engine and hence the collector box position height wise,great advice and shows that a small degrees movement can make a big difference in success and frustration levels.
good luck.
I have found the laverda system to be the hardest to get my head round and fit correctly......my longest session being three days!....crazy i know but what i found tricky was the correct positioning of the collector box which ultimately had an effect it had on the silencer levels.I also found that once I thought everything was correct when i then took the bike off the centre stand there was an almighty clang as the stand clouted the box!..........and back to square 1 again.
Best advice i did get on here and helped me understand a little was the relationship in tightening the header clamp nuts and how it raised or lowered the header pipes underneath the engine and hence the collector box position height wise,great advice and shows that a small degrees movement can make a big difference in success and frustration levels.
good luck.
G
Grant
Guest
Error in fit accumulates from front to back.
In extreme cases I have found it makes the silencers impossible to fit without massive strain on the whole system.
The factory parts fit, some aftermarket parts are good too, but some are just a smidge out here and there.
With original downpipes and collector more or less any of the aftermarket silencers will fit.
But downpipes and collectors can be out just a fraction on a bend or a weld angle and then it's fun time.
In extreme cases I have found it makes the silencers impossible to fit without massive strain on the whole system.
The factory parts fit, some aftermarket parts are good too, but some are just a smidge out here and there.
With original downpipes and collector more or less any of the aftermarket silencers will fit.
But downpipes and collectors can be out just a fraction on a bend or a weld angle and then it's fun time.
Jo
Hero member
- Location
- Cologne, NRW Germany
CLEMTOG said:
One question about the installation process:
Would not it be easier to mount the collector together with the middle header first?
And subsequently add the outer headers?
Just a thought ...
Cheers
Jo
AndyW
Hero member
Jo said:
Yep, that's the way I do it: fairly straightforward really.. in fact I fit the centre header first and then attach the collector; then fit the silencers (all relatively loosely) then fit the outer headers, all the while tapping here and there with a plastic mallet. Align the silencers just so (sometimes helps to support collector with jack or blocks of wood) and tighten clamps; ensure outer headers are set into the collector sufficiently and tighten clamps; last round of final tightening (exhaust manifold roses etc) and admire job well done.. takes about 25-30 mins 8) 8)
G
Grant
Guest
I find it easy to fit the downpipes/collector in one go.
Twist the exit pipes of the collector past the centrestand, align downpipes/header clamps with exhaust studs and fit the nuts.
Make sure you have new crush washers in the exhaust ports (held in with a couple of dabs of grease) and make sure the downpipes fit correctly into these ports before tightening up.
Support the rear of the collector while doing this.
Twist the exit pipes of the collector past the centrestand, align downpipes/header clamps with exhaust studs and fit the nuts.
Make sure you have new crush washers in the exhaust ports (held in with a couple of dabs of grease) and make sure the downpipes fit correctly into these ports before tightening up.
Support the rear of the collector while doing this.
Schurminater
Hero member
- Location
- Surrey Hills
Jo said:
I did try this method with mine after reading about it on here,however I didn?t work with mine as I then had clearance issues on the outer pipes and frame rails,.......so I did it the other way by fitting the outer first then fitting the centre one later,....worked for me then.
CLEMTOG
Hero member
thanks for the comments chaps,
the reality is that last winter I hade to repair my 30 year old stainless Jota pipes, because the inlet stubs had worn thin and there was (consequently) some cracking, my son welded on some new stubs, but as I took all six components of the exhaust for only the second re-polishing of their lives, I remembered that in order to make things fit originally, I had to have 25mm of oval tube welded into the centre portion of the header to get things right in the first place, the trouble is/was all parts were previously used on other bikes, so I have no idea who made what, the pipes were bought used and separately so was the collector, then a very lucky stroke as Ralph the fungus faced supplier of the very last one of every single Laverda part in the book, was repairing a crash damaged bike and gave me a very slightly scratched silencer, and then inspected the left side which was also similar and said "you had better have both of those then" so I have no knowledge of who made what, no surprise that the fit wasn't too good. With the freshly modded in let stubs now fitted I was very careful to be sure that I had chain clearance on the right hand side and footy pedal clearance on the left hand side (standard pegs and levers), this made the left silencer have two welds from front of silencer to collector, and all now fits and hangs very nicely left and right,
funny thing is though, I just stood at the back of the bike and I think they are not level!, maybe I am paranoid (it was on the side stand)
anyway the main thing is that it all sits there unstressed and happy, no fowling, no problems, but the best thing is .... I cant see it when I am riding!
and for me every time, install three pipes and collector all in one go, but barely nipped on the collector clamps.
Coxy installs three pipes then plugs the collector onto the pipes, which suits him, and when he was prototyping he did that zillions of times, and in several different locations, including on the floor in Slaters showroom, his own workshop, the tube benders floor and even outside any of those places but inside the back of his van, each to their own, I guess, but as I said this is my way (queue frank Sinatra0
CLEM
the reality is that last winter I hade to repair my 30 year old stainless Jota pipes, because the inlet stubs had worn thin and there was (consequently) some cracking, my son welded on some new stubs, but as I took all six components of the exhaust for only the second re-polishing of their lives, I remembered that in order to make things fit originally, I had to have 25mm of oval tube welded into the centre portion of the header to get things right in the first place, the trouble is/was all parts were previously used on other bikes, so I have no idea who made what, the pipes were bought used and separately so was the collector, then a very lucky stroke as Ralph the fungus faced supplier of the very last one of every single Laverda part in the book, was repairing a crash damaged bike and gave me a very slightly scratched silencer, and then inspected the left side which was also similar and said "you had better have both of those then" so I have no knowledge of who made what, no surprise that the fit wasn't too good. With the freshly modded in let stubs now fitted I was very careful to be sure that I had chain clearance on the right hand side and footy pedal clearance on the left hand side (standard pegs and levers), this made the left silencer have two welds from front of silencer to collector, and all now fits and hangs very nicely left and right,
funny thing is though, I just stood at the back of the bike and I think they are not level!, maybe I am paranoid (it was on the side stand)
anyway the main thing is that it all sits there unstressed and happy, no fowling, no problems, but the best thing is .... I cant see it when I am riding!
and for me every time, install three pipes and collector all in one go, but barely nipped on the collector clamps.
Coxy installs three pipes then plugs the collector onto the pipes, which suits him, and when he was prototyping he did that zillions of times, and in several different locations, including on the floor in Slaters showroom, his own workshop, the tube benders floor and even outside any of those places but inside the back of his van, each to their own, I guess, but as I said this is my way (queue frank Sinatra0
CLEM
VanguardontheLav
Hero member
- Location
- Cambridge, UK
LJ said:
Well I have Keihan down pipes and silencers and a Cox collector - did a bit of prototype testing for him - and it all fits well in the suggested sequence: front to back, everything loose, adjust and tighten bit by bit.
?
Dick
helicopterjim
Hero member
- Location
- near Lone Butte, BC, Canada
Paul Marx said:
Really?
https://www.youtube.com/watch?v=Sv5DdTIKk48
Laverda SF
Hero member
Could never keep the Dual Tail Pipes on my 460cu 7200rpm 625 Hp MKIV BBC even in my 70 Z28; on the other hand, I never had that problem with my 70 Breganzie 750 SFO with 2 into 1 pipes.
Funny thing about that 70Z as sometimes I didn't have that issue as the exhaust system simply blew off - LOL
Just keep the pipes outta the way of the Shifter or Rear Brake lever and don't allow the pipes to bounce you off the road.
If your that concerned about uneven dual tail pipes on your Jota perhaps you should consider 3 into 1.
I just can't resist CLEM ;o)
Funny thing about that 70Z as sometimes I didn't have that issue as the exhaust system simply blew off - LOL
Just keep the pipes outta the way of the Shifter or Rear Brake lever and don't allow the pipes to bounce you off the road.
If your that concerned about uneven dual tail pipes on your Jota perhaps you should consider 3 into 1.
I just can't resist CLEM ;o)