SOHC.co.uk Forums > CB750

swingarm needle/roller bearings

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Bryanj:
I seem to remember that as i was finishing working on the bikes it was as the Honda first mono rear ends were getting to mot and the link bearing failure rate was very high, also a labourious and expensive job to do whilst the leading link plastic bushes on the small stuff lasted till 10+ and were a doddle to do plus cheap.
Swing arm bushes dont need to be bronze they can be nylon/plastic as long as the correct grade is used, some really good bearing grade stuff out there now.
Two stroke small ends do roll completely as they run, even the uncaged crowded roller ones

haynes66:
quick update, the bearing i need is a 6202-2RSD14C3 which is available but quite a lead time. according to my slightly worn micrometer the 750 swingarm shaft is 14mm so hopefully the above bearing should work, being a 14x35x11mm

K2-K6:
Sounds like a good solution, interested to see if it solves your problem when it arrives.

Many of the motocross rear linkages use needle rollers too,  also got that setup on my CBX 750 with original bearings still OK.

I use (what was known as Duckams Keenol) grease in these applications.  It's effectively more or less waterproof for marine environments,  and uses zinc oxide as sacrificial in preventing corrosion.  It's been particularly effective all the time I've used it in keeping them in good condition and no appreciable wear.

Trigger:
Not sure were you get the 35 OD from ? The swing arm ID is 26.5. Don't think you can get away with only 14mm depth, the smallest depth I can find on a bush is 32 mm. So if you use 2 bearings per side that may work.

Just twigged, the CBR is 35 ID ?

A C3 is a high speed bearing and will have too much clearance for what you need. A STD will do.

haynes66:
the cbr set up is a little strange. on the drive side of the swingarm there is one needle roller and two 35mm dia roller on the opposite side. there are spacers that the spindle passes through also. the width of each bearing is 11mm and the cbr spindle is 15mm. the cb spindle is thinner though, which is why i think a 14mm internal might work - i hope

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