Manufactured from seamless and ground polished stainless steel polished tubing - these SOHC bevel tubes are manufactured with exactly the same pressed flange as the original items.
These items are the standard length for 350cc SOHC (and Longstroke DOHC engines) - and the open tubing on one end allows for slight flexibility of length, useful if fitting compression plates - the flanged end is fitted into the top bevel housing in the cambox.
Maunfacturing Background:
Original tubes were normally chrome plated steel - but most get dented and the chrome flakes and pits - re-chroming normally costs a lot and often does not get the pitting out.
These stainless steel items - particularly when fitted in unison with our own CNC machined Bevel Tube Nuts totally transform the look of the SOHC engine, and look really nice. They are also durable and do not rust.
The tube is special seamless/ground polished stainless (and very expensive!), and we then press the flange using purpose made hardened press tools to form the correct flange profile. Because of the toughtness of the thin wall tubing - this process is more complex than you would expect, requiring rough pressing first, then final profile flanging - to avoid the lip splitting.
Once the tube flanges are pressed, the tubes then go back on a lathe (with special jigs to avoid damaging the tubes), where we final linish/polish the stainless, to ensure no residue marks from the flange pressing process remain. We then cover with plastic tubing to avoid scratching in storage
Therefore -- apologies these tubes are not cheap, but hopefully you will understand from the complexity of the above process why this is - they are very labour intensive to manufacture.
Latest Update 2022: We have just manufactutred a new batch of these tubes - and the cost of the special seamless tubing (which is only availabe from one supplier in the UK) has - like all non-ferrous steel material,) risen by a large amount since last made - but they are now at least back in stock!
Price is per tube.
