SOHC.co.uk Forums > CB750
CAN'T FIND NEUTRAL WHEN HOT
Nurse Julie:
--- Quote from: pewe on April 07, 2020, 07:01:04 AM ---
The old UK bikes runs with straight 50, right?
--- End quote ---
I do remember in the dim and distant past I may have use 50 on some of my pre unit Brit bikes but that was a totally different design and engineering tolerances. The thicker oil also helped it from pouring out of the all the joins in the cases.... But it didn't help much.
bobv7:
"The old UK bikes runs with straight 50, right?"
Not since the 1950s! ::) Interesting you should be experimenting with mixing the blends from various manufacturers. You must have a lot of free time on your hands as all motor lubricants whatever their SAE rating are basically formulated to the same standards. The only differences are the oil companies making minor changes to the additives to imply a USP that makes their product better than others. A 10W40 from company "X" will not be substantially different to company "Y"s product for the simple reason they have to be compatable and not cause damage when mixed. Oil blends have to differ across the world simply due to the different climatic operating temperatures. What works in a tractor unit in Iceland probably wouldn't be much use in the Sahara. 8)
Green1:
--- Quote from: Bryanj on April 07, 2020, 08:12:07 AM ---Only ever used 10 40 in dealerships never 20 50 and no problems except the known fact of neutral, even Honda said select neutral as stopping not when stopped
--- End quote ---
Both my Hondas and Guzzi have to be rolling to select neutral. Both are air cooled the Hondas run on 10W 40 and the Guzzi on 10w 60
MrDavo:
Oil threads in car and bike forums are to be avoided like religion and politics - they can go on forever and, being more faith based than scientific, no one ever changes their mind.
I ran both CB750s I have owned on 10-40, and however well I had my clutch adjusted, just like any other bike from that era I have ever ridden, neutral was something best found before you rolled to a stop. At lights that I knew were going to be ages, such as roadworks, if I hadn't pre-selected neutral I'd switch off for a second, get neutral and restart. At least we have luxuries like electric start and a neutral light - not so easy on a Brit twin.
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