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by Volker_P
Fri Nov 16, 2018 5:48 am
Forum: General Discussion
Topic: '82 cb650sc project
Replies: 10
Views: 914

Re: '82 cb650sc project

Another question that crosses my mind is whether there is value to having a rear inner fender to protect the back of the motor and the under seat area. If you are not going to keep the stock airbox (most cafe builds imply pod filters, so I simply assume yours, too) a fender is probably a quite good...
by Volker_P
Fri Nov 16, 2018 5:38 am
Forum: Technical Discussion
Topic: Having an issue seating the cylinder block.
Replies: 12
Views: 383

Re: Having an issue seating the cylinder block.

Sorry that I have to say this but your proceeding is inappropriate. You assume there are no filings in the channels from cutting the threads, you think the head bolt threads down there in the case are not stripped (they are easily stripped BTW) etc. This means you know nothing for sure and just hope...
by Volker_P
Wed Nov 14, 2018 5:38 am
Forum: Technical Discussion
Topic: Having an issue seating the cylinder block.
Replies: 12
Views: 383

Re: Having an issue seating the cylinder block.

I also thought of cutting a thread and pull it out but I did not want to propose that because of the filings. Because I am not sure if you get them out with the engine in the frame. These (calibrated) nozzles are really important for the oil supply of the head and camshaft bearings! If one of them t...
by Volker_P
Wed Nov 14, 2018 5:22 am
Forum: General Discussion
Topic: '82 cb650sc project
Replies: 10
Views: 914

Re: '82 cb650sc project

It looks not bad at the first pictures but at the last picture the width looks quite much.
Might be just a camera focal width/perspective issue however.
by Volker_P
Wed Nov 14, 2018 5:12 am
Forum: Technical Discussion
Topic: High idle help
Replies: 10
Views: 1298

Re: High idle help

Sounds like time to remind to the most important link of this forum !
by Volker_P
Wed Nov 14, 2018 5:06 am
Forum: Technical Discussion
Topic: Which cylinder head bolts get the washers?
Replies: 5
Views: 100

Re: Which cylinder head bolts get the washers?

juntjoo wrote:... but I could be thinking of another part.

Right, it is the 22 head cover bolts where only selected bolts get copper washers.
Details see here
by Volker_P
Wed Nov 14, 2018 5:01 am
Forum: Technical Discussion
Topic: What would cause this problem I've had starting my bike?
Replies: 3
Views: 187

Re: What would cause this problem I've had starting my bike?

Right, you may just use the black manual idle knob if the choke does not move the throttle for whatever reason. Of course it makes sense to adjust the choke mechanism correctly anyway. Then you don't have to adjust idle again when the engine is warm. But the black knob is good way to get a more or l...
by Volker_P
Tue Nov 13, 2018 2:24 am
Forum: Technical Discussion
Topic: What would cause this problem I've had starting my bike?
Replies: 3
Views: 187

Re: What would cause this problem I've had starting my bike?

In fact the CB650 is no known for easy and immediate cold starts even if everything is fine.
Cranking a lot may work but this is not that nice.
Maybe you get a bit happier with this proven CB650 cold start procedure.
by Volker_P
Thu Oct 25, 2018 1:20 am
Forum: Technical Discussion
Topic: Dual Disc Brake 3-way Joint/Bridge
Replies: 2
Views: 2024

Re: Dual Disc Brake 3-way Joint/Bridge

That's what I did when I switched to stainless steel lines, too. :wink:
You need a longer MC hollow bolt for that that can clip two line connectors one above another.
by Volker_P
Tue Oct 16, 2018 2:07 am
Forum: Technical Discussion
Topic: My '79 cb650 62mm overbore project.
Replies: 2
Views: 417

Re: My '79 cb650 62mm overbore project.

Interesting project and great parts cabinet. I remember several interesting frame mods but I think here are few projects that go that deep into the engine. Probably because the chassis is already charged well enough with the stock engine power. :roll: There is the project100mpg of member pinhead who...
by Volker_P
Tue Oct 16, 2018 1:33 am
Forum: Technical Discussion
Topic: High idle help
Replies: 10
Views: 1298

Re: High idle help

That's tough, no chance for a reasonable idle that way.
If you have the black knob completely turned out I suppose flap #4 might cause the sticky throttle.
In this case when you turn the black knob in until contact to the throttle cam and another half turn in, it should not be sticky any more.
by Volker_P
Wed Oct 10, 2018 5:26 am
Forum: Technical Discussion
Topic: High idle help
Replies: 10
Views: 1298

Re: High idle help

If you turn out the black idle knob completely and you have no air leak probably one closed throttle flap (CV carbs) or slider (piston carbs) holds open three others a bit which will cause your high idle. So check your synchronization visually. The flaps/sliders should all be closed when the manual ...
by Volker_P
Tue Oct 09, 2018 1:58 am
Forum: General Discussion
Topic: Engine displacement vs stated CC's ???
Replies: 3
Views: 1047

Re: Engine displacement vs stated CC's ???

Welcome here! :D At http://irfanview.com you find a nice, free tool for picture view and resize. With regard to your side cover label issue, I would prefer the "696" just because of the visual beauty of the sequence of digits. In case you really cannot decide for sure, there is still the o...
by Volker_P
Thu Aug 30, 2018 12:52 am
Forum: Technical Discussion
Topic: 1979 Honda CB650
Replies: 24
Views: 9123

Re: 1979 Honda CB650

Please refer to the carbs section of my internal technical links list. Most of the answers you look for can be found there easily. Turning out the idle screw to richen the idle mixture is correct. But note that the complete range of the idle screw only covers one or two idle jet size differences so ...
by Volker_P
Wed Aug 29, 2018 12:53 am
Forum: Technical Discussion
Topic: Cam sprocket index marks on 1979 model?
Replies: 3
Views: 829

Re: Cam sprocket index marks on 1979 model?

The air cutoff diaphragm is there but there was a small tear along the outside edge, I thought I'd repair it with a bit of epoxy. I'll show a photo of the repair when I return from the head gasket replacement today. Well, there are four of them, only one is accessible without separating the carbs. ...

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