Search found 92 matches

by kstylian
Tue Aug 27, 2013 12:27 pm
Forum: Technical Discussion
Topic: 1981 CB650C Carb/Jet Tuning Guidance
Replies: 12
Views: 8063

Re: 1981 CB650C Carb/Jet Tuning Guidance

I really hope I misunderstood.


I think you did...you can sleep easy.

Any comments re: compression results?
by kstylian
Mon Aug 26, 2013 4:05 pm
Forum: Technical Discussion
Topic: Need new spark plug wires.
Replies: 1
Views: 1392

Re: Need new spark plug wires.

Buy 7mm copper core spark plug wire in bulk. Cut to the length you need using old wires as templates. One end screws into the plug boot, the other into the coils.
by kstylian
Sun Aug 25, 2013 11:35 pm
Forum: Technical Discussion
Topic: 1981 CB650C Carb/Jet Tuning Guidance
Replies: 12
Views: 8063

Re: 1981 CB650C Carb/Jet Tuning Guidance

Yes, Lift slides, all plugs removed, full charge battery! What is your plug gap? Did a lot of work today. Pretty much went through the whole tune-up process to make sure all was within spec. Adjusted cam chain tensioner. Disassembled/cleaned/lubed timing advance mechanism. Pulser generator gap set ...
by kstylian
Sat Aug 24, 2013 7:25 pm
Forum: Technical Discussion
Topic: Engine smothers down after warming up (Carbs?)
Replies: 8
Views: 4223

Re: Engine smothers down after warming up (Carbs?)

What do your plugs look like? Also possibly sounds like an intermittent ignition issue. how's your timing? spark advanced cleaned and working smoothly?
by kstylian
Fri Aug 23, 2013 8:12 pm
Forum: Technical Discussion
Topic: 1981 CB650C Carb/Jet Tuning Guidance
Replies: 12
Views: 8063

Re: 1981 CB650C Carb/Jet Tuning Guidance

Thanks guys. Compression is still about what it was when I bought the bike, about 120 psi on all cylinders. I've been riding it fairly hard varying throttle positions and loads trying to get the rings to set. Been using Lucas fuel system cleaner in the tank and also decarbonised with water/steam. Ch...
by kstylian
Fri Aug 23, 2013 5:41 pm
Forum: Technical Discussion
Topic: 1981 CB650C Carb/Jet Tuning Guidance
Replies: 12
Views: 8063

Re: 1981 CB650C Carb/Jet Tuning Guidance

More pics
by kstylian
Fri Aug 23, 2013 5:40 pm
Forum: Technical Discussion
Topic: 1981 CB650C Carb/Jet Tuning Guidance
Replies: 12
Views: 8063

1981 CB650C Carb/Jet Tuning Guidance

Hi guys. I posted this on the SOHC4 forums hoping to reach a larger audience, but had little luck there. Here's the scoop. I'm hoping to get some guidance setting up, or rather jetting, the carbs correctly on my 1981 CB650C. Background: Engine has ~19K miles. PO installed new rings prior to selling ...
by kstylian
Tue Aug 20, 2013 10:51 am
Forum: Bikes
Topic: 1981 cb650c part out OHIO
Replies: 10
Views: 6309

Re: 1981 cb650c part out OHIO

The master cyl is good, but looks sunfaded and a little miss shaped.. it works fine.


Sounds good. Pics and price?
by kstylian
Wed Aug 14, 2013 2:14 pm
Forum: Technical Discussion
Topic: CB650 carb synch screws, VM carbs
Replies: 1
Views: 1832

Re: CB650 carb synch screws, VM carbs

You'll need a tool similar to this. It's a hollow tube with a hex end that fits over the nut and a screwdriver that slides down the tube that allows you to adjust the screw while holding the nut, and vise versa. http://www.bikebandit.com/motion-pro-carburetor-adjustment-tool?WT.mc_id=googlemerchantf...
by kstylian
Tue Aug 13, 2013 1:59 pm
Forum: Bikes
Topic: 1981 cb650c part out OHIO
Replies: 10
Views: 6309

Re: 1981 cb650c part out OHIO

Sorry to hear, but more importantly glad you are ok!

How's the master cylinder? Pics and price?
by kstylian
Tue Aug 13, 2013 1:31 am
Forum: Technical Discussion
Topic: Front brakes rub after rebuild.
Replies: 15
Views: 6573

Re: Front brakes rub after rebuild.

Ha, yes......the rubber torri (torusses) were installed and the pucks do return/retract when pressure is released. Thanks for the insight....this makes sense and explains how/why the pistons behave the way they do. Always wondered how/why they did this. Cheers!
by kstylian
Sat Aug 03, 2013 9:44 pm
Forum: Technical Discussion
Topic: Front brakes rub after rebuild.
Replies: 15
Views: 6573

Re: Front brakes rub after rebuild.

Found the old pads and put them in. Problem solved! No rubbing and the rotors were nice a cool to the touch after a short test ride. Initial hunch was correct.....apparently the new pads were too thick. I'll sand down new pads a little and put them in tomorrow. FYI: These are Bike Master brand brake...
by kstylian
Sat Aug 03, 2013 12:17 pm
Forum: Technical Discussion
Topic: Front brakes rub after rebuild.
Replies: 15
Views: 6573

Re: Front brakes rub after rebuild.

Going to search for the old pads today and see if they help the issue.
by kstylian
Fri Aug 02, 2013 7:34 pm
Forum: Technical Discussion
Topic: Front brakes rub after rebuild.
Replies: 15
Views: 6573

Re: Front brakes rub after rebuild.

Did a bit more tinkering, but no obvious solution yet. I replaced the rebuilt OEM MC with an aftermarket unit . Pads still rub on rotor and the rotors do get hot after riding 3-4 miles. I removed the pads from the left caliper and pumped out the piston a bit. It would not retract when trying to pry ...

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