SOHC.co.uk Forums > CB750
Carb rubbers
AshimotoK0:
Got this back from DS:-
Hi Ash,
A question was raised from a customer some time ago as to whether our aftermarket inlet rubbers were resistant modern fuel. There has been reports that the additives attack rubber components and is generally far more corrosive than the old type leaded petrol. We investigated this matter at the time and was given assurance that the inlet rubber components were made to resist modern fuel. It will be difficult to obtain the precise chemical composition because this is commercially sensitive information, however if anyone does have an issue with a particular inlet set that we supplied, we would send it back for testing. We have to date sold around 600 sets of CB750K0-6 inlet rubbers over a period of 3 years and I am not aware of any complaints.
We have used several sets of aftermarket inlet rubbers on our own CB400F's without any issues.
We use 2-3 different suppliers for tensioner guides and inlet rubbers who mostly manufacturer the same type of components as original equipment for the major brands and are specialists in their fields.
I will be at Stafford-look forward to seeing you there.
Best Regards
David
David Silver Spares LTD
www.davidsilverspares.co.uk
royhall:
Got my spare set of genuine (used) rubbers from DK today. They are going right back. They are so hard I'm sure they would shatter if I hit then with a hammer. They have gone so hard I cannot squeeze them at all even on the thin end. Incredible!!!
AshimotoK0:
BTW Roy ... my 'man' is on with analyzing the rubber from the aftermarket F2 carb rubbers and says he will have an answer tomorrow for us, after I chased him up on it.
also he says it may be beneficial to post cure the 'Reofos 508' softened ones in an oven at the maximum temperature they would see in service? Can anyone suggest a temperature or in a position to measure it on a hot engine? I have a digital temperature meter but no running bike to try it on.
Ash
paul G:
I have had two sets from DSS for the 550 K3 both crap.
Neither fitted correctly when I spoke to them about the first set they said I had ordered the wrong ones so would only sell me the correct ones !! guess what yep they did not fir either ended up with a set off fleabay, guess what they FITTED :)
AshimotoK0:
--- Quote from: paul gledhill on May 07, 2015, 08:09:28 AM ---I have had two sets from DSS for the 550 K3 both crap.
Neither fitted correctly when I spoke to them about the first set they said I had ordered the wrong ones so would only sell me the correct ones !! guess what yep they did not fir either ended up with a set off fleabay, guess what they FITTED :)
--- End quote ---
We need to get evidence from other members that the DS ones are crap as he reckons they are fine (see earlier in this post) and wasn't prepared to let me have one to analyse to see if the rubber type is up to specification.
So anyone else had problems? they should be made from Nitrile rubber.
Ash
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version