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Author Topic: 81 CB 750C  (Read 8424 times)

Offline CB MIKE

  • Posts: 90
Re: 81 CB 750C
« Reply #50 on: Feb 12, 2017, 19:22:21 »
I got a little more work done on the electrics box under the seat.

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81 CB750C

Offline CB MIKE

  • Posts: 90
Re: 81 CB 750C
« Reply #51 on: Mar 02, 2017, 18:09:36 »
OK gents I need some advice. I've just about finished up on the rear end and I'm prepping to strip down and paint the frame. I threw the wheel back on to check my clearances from tire to fender area. With an F shock mounted I'm sitting at 3in of clearance in the lowest area. Trying to figure out if I will be good with that or if I need to reshape my fender to give more room. I plan on buying decent progressive shocks for front and rear but  if it needs more clearance then now would be the time to do so. I would prefer the shocks bottom out before the tire contacts the fender. Please help!

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81 CB750C

Offline esmoojee

  • Posts: 150
Re: 81 CB 750C
« Reply #52 on: Mar 02, 2017, 19:22:09 »
You could always do cbr wheel swaps.  Youd be able to get better handling tires.  Lots of guys over at the cb1100f.net site have done them.  One of them sells a kit with the right spacers.  Its an option.  Youd also have at least another 1 of clearance.

Offline brad black

  • Posts: 134
Re: 81 CB 750C
« Reply #53 on: Mar 03, 2017, 07:01:28 »
take the spring off the shock and collapse it.  if the tyre hits the plate, make it so it doesn't.

Offline CB MIKE

  • Posts: 90
Re: 81 CB 750C
« Reply #54 on: Mar 03, 2017, 10:16:42 »
take the spring off the shock and collapse it.  if the tyre hits the plate, make it so it doesn't.

It does hit that's why I'm trying to find out if the shocks will keep it from happening, if not then I'll have to reconsider.

You could always do cbr wheel swaps.  You’d be able to get better handling tires.  Lots of guys over at the cb1100f.net site have done them.  One of them sells a kit with the right spacers.  It’s an option.  You’d also have at least another 1” of clearance.

That is an option, I am currently just trying to run with what I have to get her road worthy and then later on look into things like that. I just don't want to add more things to the equation right now like figuring out new rear brake setup, chain alignment, spacers, etc.
81 CB750C

Offline esmoojee

  • Posts: 150
Re: 81 CB 750C
« Reply #55 on: Mar 03, 2017, 12:27:56 »
I gotcha, riding season is fast approaching.  When you do decide to do it I would reach out to the guys on that site.  They have all the info and parts youd need.  Good luck and I hope to see you get her out soon!

Offline brad black

  • Posts: 134
Re: 81 CB 750C
« Reply #56 on: Mar 03, 2017, 18:24:20 »
you could put a spacer around the shock shaft to limit the travel.  something with two halves that screw together.

Offline CB MIKE

  • Posts: 90
Re: 81 CB 750C
« Reply #57 on: Mar 04, 2017, 00:24:38 »
you could put a spacer around the shock shaft to limit the travel.  something with two halves that screw together.
Yeah I thought about something along those lines, that could risk damaging the hydraulic mechanism of the shock. I also considered welding some sort of stop across the top of the swingarm. How can I know the full compression of the shocks?



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81 CB750C

Offline brad black

  • Posts: 134
Re: 81 CB 750C
« Reply #58 on: Mar 04, 2017, 05:57:33 »
your spacer will hit the top of the shock body when the bump stop hits it.  no difference to anything else, i would expect the external bump stop to limit travel before the internal anyway, and you're not going to full compression.

i wouldn't stop the swingarm, that'll stress it where you stop it as the shocks will still try to let it move.

remove the spring, that way you'll know exactly what the shock is doing. 

Offline NoRiders

  • Posts: 612
Re: 81 CB 750C
« Reply #59 on: Mar 04, 2017, 14:05:55 »
If it's the seat base that'll make tyre contact first, you could beat a hump in it, which I did, and made 20mm extra clearance at least.

No detriment to the seat foam, as I was having 50-60mm thickness.