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Messages - Dolomite_

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1
Thanks Both. I'll triple check on CMS and get some bought.

Ah, I didn't realise it's F and F2 in the UK. I just assumed F1.

Mine is a UK bike. Made in 1977 so it's an F2.

2
Finally getting around to putting some rear foot pegs on my 400 four. I know they changed the location of the rear foot pegs on the F2 model but are there physically any differences between the foot pegs or are they the same?

3
CB350/400 / Re: Oil pump oil leak
« on: April 06, 2026, 09:15:18 PM »
I cleaned the oil from the pump, checked the bolt toque and seals. It all appears fine.

I went out for a ride today and checked when I got back, it's coming from the oil pressure switch. I'm going to check the oil pressure switch is torqued correctly later this week.

Are there any other measures I can take? Or is it a case of replacing the switch and testing it?

4
CB350/400 / Re: Oil pump oil leak
« on: March 29, 2026, 08:34:11 PM »
I rebuilt the engine just under 2 years ago so all the seals are pretty much new.

Ted
Is the oil relief valve in the oil pressure switch?

5
CB350/400 / Oil pump oil leak
« on: March 29, 2026, 12:14:42 PM »
What I thought might be a leak from the oil pan turned out to be from the oil pump. I've not had a chance to start it up with the chain/sidecover off to see where the leak is coming from but I suspect its from the oil pressure switch. When I stripped it I used Julie's O-ring kit and replaced them all.

Whats the best way to way to help prevent oil seeping up the thread of the oil pressure switch? Would PTFE tape be fine?

If its not the oil pressure switch what would be best to add some more seal protection to the surfaces of the oil pump?

6
CB350/400 / Re: Setting the clutch troubles
« on: March 02, 2026, 08:58:11 PM »
The clutch cable has less than less than 1000 miles on it.

When I rebuilt the engine the balls were fine, they felt smooth and had no corrosion. Next time im in there Ill have a think about replacing them. Is there a part number or size for the ball bearings?

Whats the correct routing for the clutch cable?

There are some mentions of pictures on here but the image links are dead.

How did you set your click bite point?

7
CB350/400 / Re: Setting the clutch troubles
« on: March 02, 2026, 04:50:33 PM »
Is your bike a 400?
If so is the mechanism in the housing with the three ball bearings on in good condition?

I doesn't look worn. It has the slight groves that help the balls roll out. I assume they're normal?

What are the usual signs of wear?

8
CB350/400 / Setting the clutch troubles
« on: March 01, 2026, 04:35:40 PM »
After re-tightening some gear selector bolts, applying a bit of loctite and an oil service I've been trying to set the clutch, but it's not going my way.

I've followed the steps in the haynes manual but it doesn't feel right. The bite point is slightly different in 1st compared to the other gears. In 1st it's closer to the bars and 2nd-6th its further out.

The bike also seems to rock back and forward when the clutch is held in, there is also resistance when the clutch is held in and I roll the bike backwards. I think this is because the clutch disks are fully separated or area little sticky, it's not been ridden in 4 months but this was also happening before I was investigating the shifting issue.

I've tried setting the screw at the specified 1/4 turn back after feeling resistance and also setting it when I feel the resistance, neither seem to make a difference. In both positions I've also used the adjusters at the clutch lever and at the top of the casing but neither seem to alleviate the rocking.

The more modern bikes (2000s) I've had didnt were easy to set the clutch on.

Is this the expected behaviour? Could anyone give me a dummies guide to setting the clutch?  :D

9
CB350/400 / Re: Cleaning/polishing/protection
« on: January 26, 2026, 08:18:57 PM »
TrickyMicky Yetanotherbike. What would you recommend on the chrome and exhaust for the small rust spots?

10
CB350/400 / Cleaning/polishing/protection
« on: January 25, 2026, 09:22:20 PM »
After being sat for few months and me not giving it a good enough clean before moth balling it for the winter my 400 four is looking a little dirty and a few spots have appeared on the chrome and exhausts.

What does everyone use for cleaning and them protection?

I initially just used some car shampoo, autosol and AC-50, are they all still a good shout for older bikes?

Has anyone used anything in particular to help reduce speckles of rust on chrome work?

11
CB350/400 / Re: Gearbox Stuck - The last straw?
« on: December 29, 2025, 01:55:35 PM »
Ah, I meant specifically for the bolts behind the clutch basket.

I'll have another looks through but it I dont think they were listed.

12
CB350/400 / Re: Gearbox Stuck - The last straw?
« on: December 26, 2025, 07:40:53 PM »
Good morning all!

I'm back at it now and about to go and uncover the bike.

Dolomite, did those adjustments you made solve the problem?

If not, have you had any success?

Yes, they seem to have fixed the issue. I just need to try to find some torque specs for the bolts and add a little bit of loctite. I thought I dod them tight enough when putting the engine together, I don't think any toque specs were listed in the Haynes manual.

Going to have a look for the specs and order some oil, oil filter and a new sump gasket.

Your issue seems like a bit of a freak one. I wonder why it bent.

13
CB350/400 / Re: Gearbox Stuck - The last straw?
« on: November 23, 2025, 01:41:04 PM »
I'm not immediately , in fine detail, familiar with 400 gearbox components.

In answer to this though "What actually holds the gear shift shaft in place? Is it just the gear shifter? Does anything hold it in place on the clutch side?" The shift drum will be limited for end float to control that lateral movement.  Turning it to change gear, it has to remain still while pushing & pulling the selector forks across the gearbox to select the ratios. Insufficient restraint and it will move instead of the forks, making selection poor, possibly bringing a severe clash that will break parts.

Usually it'll be something of circlip, thrust washer or bolted through a bearing that's fully retained in the case, this to give that assured sideways location.

A workshop/ parts schematic should show the relevant components.

Its the shaft that goes through the casing and the foot shifter connects to the other end. not the shift drum.

Is it just the foot shifter that holds the shaft in place? I cant see any circlips or anything else on the exploded diagrams.

14
CB350/400 / Re: Gearbox Stuck - The last straw?
« on: November 22, 2025, 07:57:34 PM »
I spent a few hours investigating the issue today. Drained the oil, took the clutch casing and clutch drum off and also the sump.

I noticed that the bolt circled in red had become loose enough to allow the disc to have some play. I think this then meant that the shift arm in blue wasn't snug up to the pins. It was catching them and then slipping off. Because the bolt was loose I think it also meant that the part behind the disc wasn't straight like it should have been.

I took the disc off and put the bolt back so I could see what was happening and when I held the arm in place it shifted fine. I added the disc back and tested it again and it felt like it was slipping off the pins again. The arm had some stiffness against the disc when it tried to return flush against the pins. This turned out to be because the gear shift shaft had moved out slightly and was putting some pressure on the arm, I pushed the shaft back and it seems to be fine.

What actually holds the gear shift shaft in place? Is it just the gear shifter? Does anything hold it in place on the clutch side?

One other thing to double check. Does the arm held in place by the yellow bolt help shift it that last little bit? When I removed the arm when testing and I would shift I would need to manually rotate the part behind the disc slightly to get it to engage the gears. This gave me a little panic because I was hearing sounds from the gear box I thought that something had become loose inside.

Lastly does anyone know the toque settings for the red and yellow bolts and also the bolts that hold the clutch springs in place? I will also be putting a bit off loctite on them.

Im not sure why the image isnt showing Ive done [img ]http://[\img ] (without the spaces)



https://imgbox.com/ZkK3587b

15
CB350/400 / Re: Gearbox Stuck - The last straw?
« on: November 16, 2025, 02:44:37 PM »
I've just had the same issue, after a 30 mile ride this morning. On the last mile when pulling away from traffic lights it wouldnt go from 1st into 2nd.

Ive done 700+ faultless miles since I rebuilt the engine in the summer of 2024.

There is a sound coming from the gearbox when I put it in 1st, hold the clutch in and spin the wheel. I cant remember if that was there before and is normal. There seems to be too much resistance when its in 1st and I spin the wheel with the clutch held in.

I'm worried that its the worse case and something has gone wrong internally but I'll take the same steps as you and take a look at the gear selector mechanism behind the clutch drum.

Hopefully you update the thread with some good news!

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