"Patina" The 1973 CB175 Cafe Racer
- Thread starter 1sttimer
- Start date
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
Installed! However I can't seem to figure out the science behind adjusting chain slack. Every time I think I have it perfect up on the stands, I put it down, roll it around and the chain tightens up significantly. So I over did it the other way (too much slack) and then it rubbed the top of the swinger when I took it around the block.
I'm open to suggestions
Installed! However I can't seem to figure out the science behind adjusting chain slack. Every time I think I have it perfect up on the stands, I put it down, roll it around and the chain tightens up significantly. So I over did it the other way (too much slack) and then it rubbed the top of the swinger when I took it around the block.
I'm open to suggestions
bike on center stand or blocks
remove bottom shock bolts rotate shocks back out of the way
raise swingarm untii chain is at its tightest point,this is when a perfect straight line exists from axle thru pivot center to front sprocket center
adjust chain so it is pretty much just zero slack when sweeping thru this travel point
it will loosen up as the travel continues up past this straight line
once you are happy with that adjustement put shocks back on and measure how much free play up and down you have ,say in the bottom run at a specific spot
remember, write down, take a picture, whatever of this correct free play with the new shocks at full droop
the chain may still occasionally slap the top of the swinger
i run a skate wheel under the chain to take up slack at full droop
remove bottom shock bolts rotate shocks back out of the way
raise swingarm untii chain is at its tightest point,this is when a perfect straight line exists from axle thru pivot center to front sprocket center
adjust chain so it is pretty much just zero slack when sweeping thru this travel point
it will loosen up as the travel continues up past this straight line
once you are happy with that adjustement put shocks back on and measure how much free play up and down you have ,say in the bottom run at a specific spot
remember, write down, take a picture, whatever of this correct free play with the new shocks at full droop
the chain may still occasionally slap the top of the swinger
i run a skate wheel under the chain to take up slack at full droop
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
Ah sweet, now that you explain this I think you have mentioned this to me once before.
You're a gem for not yelling that at me
Skate wheel is clever. Welded bracket or something?
I believe you also mentioned to me that deceleration is when I may get occasional slap. I don't imagine it's wearing the chain badly enough to hurt anything, only cosmetic on the swingarm being worn.
xb33bsa said:
Ah sweet, now that you explain this I think you have mentioned this to me once before.
You're a gem for not yelling that at me
Skate wheel is clever. Welded bracket or something?
I believe you also mentioned to me that deceleration is when I may get occasional slap. I don't imagine it's wearing the chain badly enough to hurt anything, only cosmetic on the swingarm being worn.
yeah i use a short flatbar arm to the bottom engine bolt and then another small bolt to position the arm, my SL has about 1" longer shocks so it really helps(i run longer forks as well)
it wont hurt the chain one lil bit and should not harm the swinger
on a clean bike it would take ages to wear much
in the mud/dirt on dirtbikes is a different story the chain then becomes a grinder
so when do you testride ?
it wont hurt the chain one lil bit and should not harm the swinger
on a clean bike it would take ages to wear much
in the mud/dirt on dirtbikes is a different story the chain then becomes a grinder
so when do you testride ?
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
I took it around the block tonight with the new shocks. I like them. They have a bit more sag than the others when I put my full weight on. Dave Quinn said I should have 1" sag but I don't think I have that at all. Maybe .25" sag when I sit on it.
The bumps aren't quite as harsh to me which is nice.
For some reason, I'm still battling this charging issue. Waiting until next paycheck to buy a better multimeter so I can check the stator, all the way through the harness to see what the deal is. Luckily no more intermittence. It's consistent, but consistently dies after a few days of short riding. I would be willing to bet that if I put it on a tender every night, I wouldn't have a problem with the shirt distances I go, but still I want that solved.
xb33bsa said:
I took it around the block tonight with the new shocks. I like them. They have a bit more sag than the others when I put my full weight on. Dave Quinn said I should have 1" sag but I don't think I have that at all. Maybe .25" sag when I sit on it.
The bumps aren't quite as harsh to me which is nice.
For some reason, I'm still battling this charging issue. Waiting until next paycheck to buy a better multimeter so I can check the stator, all the way through the harness to see what the deal is. Luckily no more intermittence. It's consistent, but consistently dies after a few days of short riding. I would be willing to bet that if I put it on a tender every night, I wouldn't have a problem with the shirt distances I go, but still I want that solved.
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
Took the bike for a spin today. Made sure it was charged up but I rode around for about 20 minutes.
Can't figure out this little engine noise. From my untrained ear, it sounds independent of engine speed, which is strange to me. Everything that I can think of that would make noise, would also make noise at increasing frequency as engine speed increases. But it doesn't seem like that happens.
Also, is it possible for throttle response to change as the engine breaks in? Seems like I have some flat spots I'm uncovering.
Took the bike for a spin today. Made sure it was charged up but I rode around for about 20 minutes.
Can't figure out this little engine noise. From my untrained ear, it sounds independent of engine speed, which is strange to me. Everything that I can think of that would make noise, would also make noise at increasing frequency as engine speed increases. But it doesn't seem like that happens.
Also, is it possible for throttle response to change as the engine breaks in? Seems like I have some flat spots I'm uncovering.
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
Crickets ever since I got the bike running
Tell me what you guys think about this diagnosis. Bike runs much better cold, more power through all throttle ranges. Once hot, after 10 mins of riding and such, power diminishes slightly overall, and also hesitates a little from about 0-.25 throttle. Not much but noticeable.
Also, I'm starting to get what I would describe as a knock/tick sounds that increases with RPM and gets worse as the engine speed increases.
I'm thinking timing is off again and I didn't tighten the plate enough and it vibrated to another position. What do you guys think?
Crickets ever since I got the bike running
Tell me what you guys think about this diagnosis. Bike runs much better cold, more power through all throttle ranges. Once hot, after 10 mins of riding and such, power diminishes slightly overall, and also hesitates a little from about 0-.25 throttle. Not much but noticeable.
Also, I'm starting to get what I would describe as a knock/tick sounds that increases with RPM and gets worse as the engine speed increases.
I'm thinking timing is off again and I didn't tighten the plate enough and it vibrated to another position. What do you guys think?
1sttimer
Over 1,000 Posts
Re: "Patina" The 1973 CB175 Cafe Racer
It's moved a little bit from the mark but I didn't know if that would cause an audible noise, especially with this small combustion chamber. But that's cool, I can adjust that and need to.
Cam chain adjustment. I'll need to read the manual on that one. I regret not upgrading that component when the engine was apart.
xb33bsa said:
It's moved a little bit from the mark but I didn't know if that would cause an audible noise, especially with this small combustion chamber. But that's cool, I can adjust that and need to.
Cam chain adjustment. I'll need to read the manual on that one. I regret not upgrading that component when the engine was apart.
you can check to see if the cam chain is loose do it first to give you an idea what is happening
if you put a wrench on the stator bolt and gently rock the motor back and forth a few degrees while watching the cam at the advancer you should be able to see a slight delay if the chain is loose
if you put a wrench on the stator bolt and gently rock the motor back and forth a few degrees while watching the cam at the advancer you should be able to see a slight delay if the chain is loose
HerrDeacon
Over 1,000 Posts
Its probably running a bit rich. The extra rich fuel helps the bike run good when its cold but hurts performance when then engine is up to operating temps.
Could also be timing like you mentioned. Best to check that again to verify and check the plugs to see how they look.
Could also be timing like you mentioned. Best to check that again to verify and check the plugs to see how they look.