Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
When working in the 70's we used silkolene, which we got from Popes in Bristol who were a pushbike shop but also the main Suzuki spares dealer for the sothwest and used to buy an artic load of oil at a time in 5 gall drums
I have. been thinking of changing the main jets to 110 they turned up today Exhaust are hm341, carbs are 657b, needle set in middle, compression all around 160psi has just had top end rebuild new rings valves re ground, dynas ignition so no points Carb sync with carbtune pro main jet was 120 slow 40 air screw 1and 1/2 out
Quote from: Johnwebley on July 27, 2023, 01:35:58 PMThanks Ted,so for an old worn motor, like a 1960s Mini,a 50 grade is OKFor a modern tight clearance motor, a 5 is OK for cold startsSo,would a 5 x 40 be ideal for our sohc motors?If no,why?Sent from my SM-A546E using Tapatalk.........I do not have enough knowledge & long term experience of sohc engines to advise you if a 5W/40 oil would be suitable - I suspect that grade would be fully synthetic so probably no one has done the testing & research to find a true answer based on rigorous testing. In reality my experience on different oil brands/grades is anecdotal - we read the adverts & technical specifications and are swayed with a term like contains Zinc or PTFE etc we make choices that suit our wallet and personal preference's. As has been said before any oil is better than none. Reverting back to original Honda engine oils as per old handbooks etc is based on technology that is now 50 or more years old but no one I suspect has explored if a more modern oils are better or backwards convertible across the range. The idea that a modern synthetic engine oil is worse for your engine than one designed on synthetic technology I find very hard to accept.
Thanks Ted,so for an old worn motor, like a 1960s Mini,a 50 grade is OKFor a modern tight clearance motor, a 5 is OK for cold startsSo,would a 5 x 40 be ideal for our sohc motors?If no,why?Sent from my SM-A546E using Tapatalk
Yes cold and no oil