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Topics - McCabe-Thiele (Ted)

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406
When I had my Yamaha XJ900 the clutch always stuck after a few months of not being used. What causes the clutches to actually stick is it moisture in the engine oil?

When I asked my B-i-L what he did with his quite large motorcycle collection of bikes he almost never rides he told me he put a wedge  in the clutch lever to hold it in the disengaged position!

What is the view here on the sohc site as the best method of avoiding clutch sticking?

407
CB350/400 / Two quick questions ?
« on: October 21, 2020, 04:34:42 PM »
I have stripped the clutch case cover with Nitromores is this suitable for painting or do I need to get some 1200 grit and remove the dark patches?Cutch Cover by Macabe Thiele, on Flickr




I was given 2 free oil filters with the bike are EMGO any good they came with the two O rings?


Oil Filters by Macabe Thiele, on Flickr





408
CB350/400 / Engine Covers etc oven bake at what temperature / time etc ?
« on: October 15, 2020, 05:57:15 PM »
I've read about using SIMVHT31D paint with recommendations to bake it on in the oven.

Just need to know the cooking instructions - is it put in oven when wet (fire hazard?)or touch dry ?

In a preheated Fan Oven - what temperature is needed - for how long ?

409
CB350/400 / CB400F2 - front brake parts what's missing?
« on: October 12, 2020, 01:17:48 PM »
The front brakes aside from the disc itself was all in bits in various boxes so yesterday decided to see what is obviously missing with a view to assembling the unit.
I have photographed what I have - so far I need the to replace the following that is apparent at first glance.
No mounting bolts or nut to attach the support to the front fork including associated washers. No bolts to clamp the two halves of the caliper together. The odd spring and long screw has no nut/end plus the screw is out of shape.
It came with a replacement piston as the old one is badly damaged - it has a brass coloured end part - I am assuming that that goes against one of the brake pads. I have no pin between two pads mentioned in the manual but the roll pin type locaters for the pads are OK. I have new DS pads with the nylon pad cushion. DS I guess will be able to supply the bits that I have mentioned as missing & the long bent screw.

Anything else I need to worry about - the caliper bore looks good I have no idea if the piston seal is the original or has been replaced - it looks as the design does not include what I would describe as a dust/water seal/bellow.
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.front brake parts by Macabe Thiele, on Flickr

410
CB350/400 / Clutch operating camshaft thingy - worn or normal?
« on: October 10, 2020, 03:14:22 AM »
At first glance I thought this was badly worn but looking at the part picture on DS it looks like its how they are designed!
When I reassemble it is there any point in packing it with grease or will the oil in the clutch somehow provide lubrication?




Clutch casing mechanism by Macabe Thiele, on Flickr

411
CB350/400 / Castellated Clutch Nut - how tight ?
« on: October 09, 2020, 07:52:01 PM »
I've been looking for a torque setting for the above nut - does 30Lb-ft sound about right?

412
Assembled the clutch basket today I have the flat edge of the plain metal discs facing the engine with the notch marked discs all facing outwards and together. The smaller friction disc is against the retaining clip. All looks good and now fitted to the bike, dished washer facing out, lock washer in position,

Just one question about the castellated lock nut - the old one was plain side out with the beveled side against the lock washer - facing the engine.

Is this the right way round before I fasten up and fit the springs etc?

413
CB350/400 / Clutch assembly question ?
« on: October 08, 2020, 12:03:43 PM »
I'm going to reassemble the clutch later today I have only just noticed one plate is different from the other six being a tad narrower.

Not sure which end this one goes is it the first or the last ?

414
What is it? / Can't remember if this was a 250 Benly or a 250 Super Sport
« on: October 07, 2020, 06:48:30 PM »
Ted's Honda 250 circa 1967 by Macabe Thiele, on Flickr

I am not sure which Honda 250 model this is - no comments about my attempted facial growth please it was in 1967!

415
CB350/400 / What is the notch marking for on the CB400F2 clutch discs ?
« on: October 06, 2020, 03:10:51 PM »
All but one of my clutch plates have a notch marked on them what is the marking for please is it something to do with the assembly my manual does not seem to mention them?



notch marked clutch plate by Macabe Thiele, on Flickr

416
CB350/400 / What Gasket Goo ???
« on: October 06, 2020, 10:20:14 AM »
Im wondering what gasket adhesive (if any) members us when assembling stuff like clutch covers, engine halves, barrells  etc - obviously not including head gaskets.

Back in the day on mini engines it was just clear grease or for the likes of my old Triumph 21 back in the 1960's  Red Hematite (that never cured the oil leak for more than 10 days).


417
CB350/400 / Best clutch replacement if needed ?
« on: October 05, 2020, 10:40:25 AM »
I've got the clutch basket out now  and am wondering if I ought to replace the friction plates  regardless of condition?

The only marks I can see are very slight surface imprints of the clutch discs on the plates - no grooves or anything. Looking through the receipts I got with the bike no sign of any clutch parts having been purchased by the last owner though it has clearly been dismantled before due to the damaged lock nut.
To my surprise the clutch was not stuck either the operating cable is in very poor condition so this may have been the reason it seemed to have poor travel with no real feel.
The friction material doesn't look worn but then I don't know how meaty they are when new.

What's the views here replace it anyway together with the springs ?
Is there a better brand than DS ?




418
CB350/400 / Someone has been here before without the clutch tool.
« on: October 04, 2020, 09:48:39 PM »
Obviously this is not as it left the factory slightly chewed clutch basket retaining nut with iffy locking tabs.
I guess a special tool is the best option to undo and more importantly tighten up again.

Is there a trick to stop it turning - is the DS Tool the thing to use?




Clutch nut by Macabe Thiele, on Flickr

419
CB350/400 / CB400F2 Dynamic Timing Question.
« on: October 01, 2020, 02:09:56 PM »
As I initially set the timing statically I thought I would do a check of it dynamically as it takes quite a bit of cranking from first start when cold to run. Once it has run it starts pretty easily - it could of course just be a fuelling issue or compression related but I'm thinking the timing might be a tad retarded.
I checked Cylinders 1 & 4 first I had to guess the engine RPM as the rev counter is not connected at the moment, on what sounded like around 1200 rpm the F 1.4 mark aligned nicely. When I tried the 2 & 3 moving the connector onto plug 2 the marks were pretty much out of view.

The Dynatek instructions state:- "The engine can also be timed dynamically using a strobe light in the normal manner.
Use the advance marks and an engine speed of about 2500 RPM (full advance)."

When I tried this again guessing the RMP as 2500 - roughly double the engine idle speed. The 1 & 4 marks lined up to the right of the F marks were there are two close together marks.

Am I right that the 2 & 3 timing must be out as it should be showing as per 1 & 4 except showing 2 & 3 marks with the strobe?
Reading my Haynes Manual is more confusing as it talks about "The two advance marks are on either side of the static mark"?

Suggestions are welcome please. Ted


420
CB350/400 / What make chain is best on CB400F2
« on: September 28, 2020, 04:02:58 PM »
I like the look of the expensive rear drive sprocket on the DS website that incorporates the chain guard so am wondering what chain to go for the Honda Genuine Chain at £37.19 plus VAT looks a competitive price - are there better brands out there ?

My new plan on the build is to at least get a chain on so I can see if the gears appear to be okay.
No doubt the clutch will be stuck so I guess that will have to come out and be replaced after 12 years of standing.

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