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1  General Category / Tech Corner / Re: Not reving above 7k from second gear onwards on: Today at 12:38:07 PM
There is no restrictor on the USA variant of the bike, so I guess it's kept separate so as to be easily excluded from export bikes?

If you unplug it, or if the restrictor is faulty, gives the same symptoms of won't rev out. Usually though it would cut to around 6k rpm not 7k rpm. Maybe with enough run up it'd creep to 7k, but probably not.
2  General Category / Tech Corner / Re: Lower Exhaust mount bracket on: March 09, 2019, 04:22:32 PM
Forgot to post my results here but here is what I came up with, its a little thicker material than the factory piece so hopefully it should hold up alright!
Nice work
3  General Category / Tech Corner / Re: Not reving above 7k from second gear onwards on: March 09, 2019, 04:01:42 PM
If the restriction is disconnected it tells the ECU that you're always going over 180kmh and always to restrict the ignition. Speedo cable wouldn't be relevant there.

I've previously looped black/brown and orange/blue with no further issues.

If that doesn't fix it, you may have other problems in carbs or coils.
4  General Category / Tech Corner / Re: Not reving above 7k from second gear onwards on: March 03, 2019, 05:52:49 AM
There is a disc on the Speedo with a tab which covers a sensor as the needle gets to 180kmh. The restrictor just cuts power on the orange/blue wire when that happens, restricting the ignition to about 6k.

Find that orange/blue wire. Could be it's come unplugged. If it has non original plugs the restricted will be missing which will give same symptoms.

Easy fix, give 12v to that wire.
5  General Category / Tech Corner / Re: Not reving above 7k from second gear onwards on: March 02, 2019, 11:29:47 AM
Is it a Japanese or USA model?

Japanese has a top speed limiter which can fail and seem like what you say.

USA that would sound like an issue in the carbs or fuel delivery system.
6  Classifieds / Wanted / Re: Carb Joint Kit Parts on: January 09, 2019, 03:36:24 PM
Good stuff!

It happens due to the ethanol content in modern fuel. Those are made of a type of rubber which resists it.

Be careful with the plastic T parts anyway, but they'll probably be fine.

If you can, get a Vessel brand or other JIS PH2 size screwdriver to take the carbs apart. The screws are fine until you go at them with a normal European Philips driver, that's when the heads round out.
7  Classifieds / Wanted / Re: Carb Joint Kit Parts on: January 09, 2019, 12:45:38 PM

These guys make better than OEM seals, assuming your plastic parts are ok.
8  Classifieds / Wanted / Re: cb1 engine cover on: December 25, 2018, 08:03:10 AM
one more tip, Graeme France (find Graeme France racing on Facebook) has made a batch of replica gaskets which fit well. The eBay gaskets don't really line up right.

GF is also a good source of used CBR parts
9  Classifieds / Wanted / Re: cb1 engine cover on: December 25, 2018, 05:09:21 AM
Hi Ali, welcome!

You can use a cover off a cbr400 or cb-1, I think cb400sf covers also fit but I'm not sure. Cbr600f1 covers are similar but use a bigger generator so unless you swap all that stuff too, it won't work.

If you get an OK one, you can smooth it off and fill any marks with epoxy.

You could get replica chrome caps but looks like no more.
10  General Category / Tech Corner / Re: Rear shock bouncy on: November 01, 2018, 01:38:10 PM
Does anybody know if its possible to get a rebuild kit for the rear shock thats either aftermarket or oem   Sent from my iPhone using Tapatalk
You can fix anything with a big enough hammer, however a shock absorber needs to be gassed with high pressure nitrogen and that's a quite expensive hammer.

Easier and cheaper to get a blackbird shock and 900rr sidestand.
11  General Category / Tech Corner / Re: Lower Exhaust mount bracket on: November 01, 2018, 01:36:35 PM
I think a lot of them are broken off just there, but the exhaust never seems to suffer because of it. Maybe the bike vibrates a little more than it would? Hard to say.
12  Classifieds / For Sale / Re: Found on Craigslist Vancouver, CB-1 Type 2 on: October 11, 2018, 01:43:56 AM
Wow... listing shows 72000 miles. I paid $3300 for mine, and it only had 4000 miles.
Not sure what 3000 Canadian works out to in US $$$, but seems way high for that many miles
2,300 USD. Idk if it's good or bad but looks like much less on paper than 3k.
13  General Category / Tech Corner / Re: Adjustable brake lever to fit the CB-1? on: October 09, 2018, 04:28:54 AM
Same lever pattern as period cbr600&900 models.
14  General Category / General Motorcycle Discussion / Re: Is it possible to put a CBR600RR swingarm on the CB-1 on: October 05, 2018, 08:13:15 AM
Everything is possible with a big enough hammer. But I think that idea takes a pretty big hammer. That's from a guy who has nc29 arm fitted.

Would be a whole lot easier to just make better spacers for the wheel you already have.
15  General Category / Tech Corner / Re: Preparing the CB-1 for restoration on: August 31, 2018, 05:22:48 AM
First thing to say is, are you doing a restoration, or are you putting it in boxes to sit on a shelf? These aren't the same but one can quickly turn into the other.

I'd leave fuel in the tank, but spraying oil around seems reasonable. It'll be easier to paint empty though. Bear in mind that the oil will then run through your engine though, don't overdo it.

Over time left disassembled, the water seals in the engine will perish. Damhikt. Seals in the carbs will dry out (be fine if you used the viton type from Thailand). Fork and brake seals, plus tyres can all dry out over long term storage.

Never try to paint a bike still assembled. It'll look horrible. Take it out, clean it very thoroughly and paint the whole thing in black or silver engine paint, mask the covers but don't need to be too precise. Then remove the side covers, strip all the paint chemically, and put some enamel or powder coat on. Refit with new gaskets from Graeme France and some stainless bolts.

Front engine mount bolts will almost definitely be stuck and, if really corroded, can crack. Go straight in with the big guns. Drip penetrating oil in over as long as you can, get it really hot to expand the alloy off the bolt (this is key), and hit it with an impact gun rather than a long lever.
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