I assume you have checked you have a spark on number 2?
then check for vacuum leak on number 2 carb to start with if not a split carb to head rubber, do a compression test on #2
Search found 225 matches
- Sat Jul 08, 2017 3:56 pm
- Forum: Technical Discussion
- Topic: 79 CB650 Running only on 3 Cylinders
- Replies: 3
- Views: 4591
- Thu Jul 06, 2017 5:47 am
- Forum: Technical Discussion
- Topic: Pod Filter Alternative?
- Replies: 23
- Views: 21881
Re: Pod Filter Alternative?
I've posted them in a drop box for you or anyone to access along with all the other pictures etc.
viewtopic.php?f=4&t=14113
viewtopic.php?f=4&t=14113
- Thu Jul 06, 2017 5:42 am
- Forum: Technical Discussion
- Topic: Custom Airbox
- Replies: 1
- Views: 6572
Custom Airbox
I get quite a few messages asking for the information on how I made my custom airbox, that replaces the standard and unlike pod filters does not need a lot of messing about with jets. So I've pulled all the pictures and drawings together and dumped them into a drop box that anyone can access from th...
- Sat Jul 01, 2017 3:50 pm
- Forum: Technical Discussion
- Topic: crappy Carb boots!
- Replies: 2
- Views: 3631
Re: crappy Carb boots!
yes I always buy new ones
- Fri Jun 30, 2017 3:34 pm
- Forum: Technical Discussion
- Topic: crappy Carb boots!
- Replies: 2
- Views: 3631
crappy Carb boots!
Does everyone have problems with carb to head rubber boots splitting? every year I have one or two go bad on me and crack (usually resulting in me limping home of three cylinders). anyway I'm looking at changing to silicon tubing (reinforced turbo intercooler spec) has anyone done this yet? I've ord...
- Thu Feb 23, 2017 5:43 pm
- Forum: Technical Discussion
- Topic: Carb problem
- Replies: 3
- Views: 4539
Re: Carb problem
what makes you think they are dragging?
It is on a direct mechanical linkage so unless the throttle won't snap shut it should not be a problem.
Silly question but I assume the heavy closing spring is still on the bike
It is on a direct mechanical linkage so unless the throttle won't snap shut it should not be a problem.
Silly question but I assume the heavy closing spring is still on the bike
- Sat Jan 07, 2017 1:07 pm
- Forum: Technical Discussion
- Topic: top coils not firing
- Replies: 4
- Views: 4578
Re: top coils not firing
Easiest way to test is the switch the wires between the coil (primary coils) that will see if the fault is the coil or the 12 volt circuit. If 1 and 2 still have spark then it's not the coil (it will be the trigger/control circuit), if 3/4 now work and 1/2 don't work it will be the coil
- Tue Jan 03, 2017 5:30 am
- Forum: General Discussion
- Topic: Help Putting on new bars
- Replies: 16
- Views: 20400
Re: Help Putting on new bars
here's what I did for mine (1981) to fit 1" bars, you have to bore out the Front brake and clutch lever clamps but that is also easy
viewtopic.php?f=4&t=10912&p=75370&hilit=jcasey007#p75370
cheers
Jim
viewtopic.php?f=4&t=10912&p=75370&hilit=jcasey007#p75370
cheers
Jim
- Sun Nov 06, 2016 3:04 pm
- Forum: Technical Discussion
- Topic: Clutch question
- Replies: 3
- Views: 4549
Re: Clutch question
thanks both
I have to admit I've never adjusted it there even after the engine build, great as I didn't want to open the engine up
cheers
jim
I have to admit I've never adjusted it there even after the engine build, great as I didn't want to open the engine up
cheers
jim
- Sat Nov 05, 2016 2:14 am
- Forum: Technical Discussion
- Topic: Clutch question
- Replies: 3
- Views: 4549
Clutch question
Hi All I've been piling on the miles this summer and one thing that I need to fix over the winter is a clutch issue, so before I strip it down, just want to check your collective thoughts. The problem is - The clutch does not fully disengage when the level is pulled in. I've adjusted both ends to th...
- Wed Jun 01, 2016 4:29 pm
- Forum: Technical Discussion
- Topic: 1981 CB650 #1 Cylinder not firing
- Replies: 28
- Views: 25652
Re: 1981 CB650 #1 Cylinder not firing
wont using a relay introduce a change in ignition timing as there will be a millisecond delay in closing the contacts.......or is this a test for checking the standard wiring to the coils only?
- Thu May 26, 2016 7:02 am
- Forum: Technical Discussion
- Topic: Exhaust system impact?
- Replies: 4
- Views: 4560
Re: Exhaust system impact?
Since I fitted a MAC 4:1 system instead of my open cherry bomb, the bike starts, revs and idles better than it has ever done, so I would say yes, back pressure on the CB650 is important.
why this is I cannot tell you
why this is I cannot tell you
- Tue May 17, 2016 3:33 pm
- Forum: Technical Discussion
- Topic: Helicoils found in base to bolt down block - what do?
- Replies: 3
- Views: 5358
Re: Helicoils found in base to bolt down block - what do?
yes I have heli-coils in over half of my cylinder head long bolts, done properly they are fine. at least half of the treaded holes are blind so when I did mine I drilled out through the bottom so I have more meat to helical into. I would not recommend trying to go to the next size up. check the heli...
- Sat Apr 30, 2016 3:36 pm
- Forum: Technical Discussion
- Topic: Mac 4:1 exhaust
- Replies: 2
- Views: 3109
Re: Mac 4:1 exhaust
I got it off eBay from a US supplier called 4into1 cost was $328 + shipping
- Fri Apr 29, 2016 3:57 pm
- Forum: Technical Discussion
- Topic: CB750 Exhaust fitting
- Replies: 6
- Views: 6238
Re: CB750 Exhaust fitting
if you want my 4:1 headers your welcome to them, just pay the postage.
they are in black (professional ceramic coating) and in good condition
they are in black (professional ceramic coating) and in good condition