Search found 11 matches

by oferbr
Sun Jun 23, 2019 3:57 pm
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

Re: poor performance

I found that there is no GASKET on my air filter - part #17217-426-300.
Could this be the problem?
anyone now were can I get this part? (it is missing in any site that I go to)
by oferbr
Wed Jun 19, 2019 5:50 am
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

Re: poor performance

So far things sound unsuspicious to me. Do you have any issues like backfire, hesitations at the throttle or something like that? Or does it run more or less fine and smooth but just lacks top end power? What is your current topspeed and what is your mpg? Do you live at somewhat higher altitude abo...
by oferbr
Tue Jun 18, 2019 4:24 pm
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

Re: poor performance

First check out if all four header pipes get equally hot. Plug cables from left coil go to cylinders 1+4, from right coil to 2+3. :wink: 50mph at 4000rpm at 5th gear sounds reasonable. The CB650 lives from revs rather than torque. Also full oil pressure is available only from above ~3000rpm on, so ...
by oferbr
Tue Jun 18, 2019 4:20 pm
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

Re: poor performance

Have you checked and cleaned your timing advance unit? located behind your pulse generator on the right hand side of your engine as you sit on the bike. The bob weights can stick so that your timing will not advance with engine speed. I did a dynamic test with a light gun. the advance timing is goo...
by oferbr
Tue Jun 18, 2019 4:16 pm
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

Re: poor performance

Mr_Crow wrote:Top gear should be much faster than that I would think. I don't know too much about motorcycles just yet but I do cycle a lot. Has the gear ratio between the chains ever been changed?


front sprocket 17 teeth. rear sprocket 39 teeth
by oferbr
Mon Jun 17, 2019 4:36 am
Forum: Technical Discussion
Topic: poor performance
Replies: 12
Views: 8483

poor performance

I bought 1982 cb650 last year not running and since then I am trying to get it to good running condition with some successes . got it to run but it is running poorly. it doesn't have power as I expected and at 5th gear it goes up to 50 MPH at 4000 RPM so cruising at 60 MPH is not fun and very lowed....
by oferbr
Tue Aug 01, 2017 11:53 am
Forum: Show it off
Topic: Oil leak FINALLY solved, got out for a rip to celebrate
Replies: 7
Views: 20731

Re: Oil leak FINALLY solved, got out for a rip to celebrate

Beautiful bike.
Is it the original seat only changed the cover
Where did you get the seat cover?
by oferbr
Fri Jul 14, 2017 8:01 pm
Forum: Accessories and Apparel
Topic: vacuum cylinder (carb pistons) VB44B carb for my 1982 CB650
Replies: 2
Views: 14979

vacuum cylinder (carb pistons) VB44B carb for my 1982 CB650

I am looking to buy one vacuum cylinder (carb pistons) VB44B carb for my 1982 CB650
Tanks
Ofer
by oferbr
Sun Jan 22, 2017 5:38 am
Forum: Technical Discussion
Topic: dosnt want to go over 3000 rpm
Replies: 4
Views: 4697

Re: dosnt want to go over 3000 rpm

I did not clean the gas tank. I instaled a new gas filter. The gas tank looks ok no rust inside.
fuel supply and air supply all looks good.
I will check the gap of the pulse generators and report back.
Thanks
Ofer
by oferbr
Sat Jan 21, 2017 5:30 am
Forum: Technical Discussion
Topic: dosnt want to go over 3000 rpm
Replies: 4
Views: 4697

dosnt want to go over 3000 rpm

Hi all, I am new here just bought a 1982 cb650. the motorcyle dosen't go over 3000 rpm. When I accelerate it starts to lose power when it gets to 3000 rpm and it starts to backfire. I cleened the carburators and checked the float height. But still no cahnge. can you please help- what should I do? Th...

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