750 SF1 exhaust questions

C

chrissoz

Senior member
Location
Sydney, Australia
The header pipe on my 750 has cracked and looks unrepairable. The current setup looks like it uses the original silencers but has lost its balance pipe so the header pipes are probably a custom build.

So I either need to buy new headers and balance pipe as was originally fitted or get some headers which will fit my current setup. Money is important, originality is nice but not a driving factor.

I have spoken to a couple of suppliers (Motalia, Outlander) but they are unwilling to make commitments about fitting to my non standard setup. It seems most of them make the pipes to order so would it be possible to just get them to leave them extra long and then cut them off to fit the setup? Bike is based in Sydney but I am currently in the UK visiting the rellies. Any suggestions of setups or suppliers would be great.

There is a picture of the bike here:  http://www.madeinitalymotorcycles.com/190511SF%20(3).JPG

Thanks

Chris

 
Hello, Chris.

OCT usually have the extra long headers.
Unfortunately no English website, but English spoken.
For contact details see www.octeam.de

Andy Wagner has them as a set with a balance tube in front
of the cylinder like the 750 SF (71/72).
See position 18-36A, 18-37A at http://www.laverda-paradies.de/shop/catalog.php?lng=en&cat=750&chp=18
His shop will be closed from 12/23 till the end of January.

hth
Ernesto
 
Take a look at these people, they should do what you need and usually supply from stock,prices are not too high.    http://www.armoursltd.co.uk    

Looking at the photo you've posted a link to, if that is your bike then the exhaust should be repairable,it's not as if it's rusted thin!

http://www.armoursltd.co.uk/catalogue/MasterCatalogue.pdf

Catalogue shows as 2004 but website updated Nov 2011!

Cheers Norm
 
Quite a few years ago I did the patterns for Armours for pipes that fit straight into the original silencers - no X-over box needed - seemed to work fine - regards - Phil
 
A very common mod to SF1-3 was removing the massive crossover balance pipe, often after crashing in a corner from scraping too hard. Usual method is to bend up the headers a bit and either weld or clamp a stub to fill the gap. The downside being that if the mufflers are rubber mounted the header or studs can fracture, and if muffler solid then muffler can crack. A rubber mount to the frame (weld a neat lug) at end of header pipe, and rubber mounted mufflers fixes that.
My SF pulls like a draught horse down low without the balancer, but dyno tests are reported to show a drop in bottom end power as a result of removing it.
A beautiful SF1 you have there :)
 
Thanks for the replies - attached (hopefully) is a picture of the broken pipe, not sure if it is repairable.

I don't find bottom end power a particular problem so will probably go without the cost of going back to a balance pipe.

I will give Armours a call next week as they seem to have the best pricing (esp compared to Laverda-paradies).

Thanks

Chris
 

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Crikey O'Reiley, that looks like you used Oxy-Acetylene to cut it in half!
That is either a mother-load of coked up gunge up the inside, or the grain structure has grown and grown until the end fell off.
Grain growth would happen if an inferior grade of steel were used in a high temperature application.
The bad news is if this has happened then the pipe is scrap.
 
Best to shout yourself and the machine a new set of headers... wouldnt even think about repairing that one..and if due to inferior steel used then chances the other aint too far behind this one so a fresh set wont hurt.... and hey as the bike looks sooo good then what the hey.....
What part of Sydney are you based ?????
 
Erskineville. But in UK at the moment until early Jan.

It did look pretty terminal to me so a new set will probably be ordered from Armours while I am here. Is the amount of carbon on the pipe normal or is it an indicator of rich running - most of the limited (250km) riding I have done so far has been short city runs? This is the oldest bike I have owned (by quite a long way!) so not sure what is expected.

It is a good looker - worth all the hassle and cost of the import!

Chris
 
yeah - time for a new set of downpipes I'd say...

the amount of carbon is not normal if it's more than 0,1 - 0,5mm I'd say. Is it oily or just dry? If it's dry, it's rich running, maybe due to short time blasts at lower revs. If it's oily, the head of the bike might need a service... (worn valve-guides).

HTH
 
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