SOHC.co.uk Forums > CB350/400
Should this shaft have end movement if I pull it by hand?
McCabe-Thiele (Ted):
--- Quote from: royhall on July 20, 2021, 07:17:42 AM ---Probably a silly question but you did put the half moon bearing retainers back in. I'm sure you did, just covering the obvious.
--- End quote ---
Yes on both bearings also where the stud locates on the smaller bearingd were in place correctly. Before I split the casing I'm going to look at a spare casing I have that has the main gear clusters to see how it compares but more importantly if everything is in its place how can I alter the movement. It will give me a better understanding of the gearbox & how it works. I do not know if Honda make different end gear spacers on production.
McCabe-Thiele (Ted):
Okay I have checked the gear clusters on my 'spare' casing - there is no movement discearnable on the shaft in question as per NJ's hint.
So it's Groundhog Day again (day 3) as soon as I can summon up the enthusiasm during this current heat wave!
I knew this project woud be challenging but come on Honda not this early in the rebuild please.........!
McCabe-Thiele (Ted):
I have this morning grasped the nettle and started Groundhog Day 3 before the mid-day sun saps my energy.
Good news is everything was seated & in place as it should have been - 98% of the Hondabond has been removed with thinners from the two crankcase surfaces with relative ease. Only downside is some runs on my painted cases - easily fixed.
The rear countershaft / output shaft is all as it shoud be with naff all lateral movement between the end bearings.
The mainshaft however definetely has quite a lot of lateral movement between the end bearings most noticeable between the small end gear (second gear) at the needle roller end. The spacer is in place but clearly something is not right to me it's just a lot of travel. Unlike the output shaft I have not taken this unit apart.
When I find my feeler gauges I will measure it and post here again.
McCabe-Thiele (Ted):
Okay if I insert 40 tho" feeler gauges into the gap between the end spacer & second gear its then like I think it should be imho.
40 tho" is 1.016 mm that sounds far too much
Not sure where to start but I guess the two end bearings are places where wear is most likely. DS tell me the bearings are colour coded & difficult to find I hope the guy in parts was confused with mains bearings!
There is no obvious wear on the large mainshaft bearing inner race or contact wear where it sits against the fixed mainshaft gear. The needle roller unit at the other end looks normal the 20mm thrust washer that sits between the needle roller & second gear does not show excessive wear - you can tell which way round the washer was (is) as there is a rotary mark where it has been against the gear but the wear is very slight - certainly nowhere near enough to explain the lateral movement.
The only thing that I can see that would alter the end float as it's one shaft is the thrust washer at the small end unless the large main end bearing is made to different thickness to allow for crank case widths when they are machined?
Any advice welcome at this point.
McCabe-Thiele (Ted):
First thing that I have found out is that there is a slight ovalation of the slot where the locking pin sits in the roller bearing outer casing.
My thoughts are to firstly get a new pin if they are available together with the needle roler bearing plus replace the thrust washer anyway.
I have rotated the bearing to get a picture of the location hole - it does not show up the elongation that well tbh.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version