Rear shock and tyre

[91cb-1]

Hi all just wondering If i was to change the rear shock to the cbr900rr shock what year would it have to be to fit my 91 cb-1 and if i was to change my rear tyre to a 150 60 would it fit the rim of the stock cb1 wheel? it sounds like it'd be a nice change i could do with the extra hight on the rear and the 150-60 sounds much sturdier than the stock 140/70 thanks again

[kneepuck]

Not sure on the year of shock (i found a used fox shock) but a 150/60 fits with out a problem. I'm a little confused by your statement that you will be adding rear height by going to the 150/60 over the 140/70. I had thought the /60 or /70 was a height measure as an aspect ratio of width? So not sure a 150/60 is taller than a 140/70 on the same size rim. A 150/70 should be about 90mm high and a 140/70 should be about 98mm. putting them on the same size rim with change that a bit, but not sure now to figure that part.

[ptlcb1]

1993-95 900RR shock

[bbanna]

Keep in mind about going to a CBR900RR shock that the 900RR uses a linked suspension. From what I hear about others using the 900RR shock and for myself, the spring is to soft. The CB-1 does not use a linked suspension.

Brian

[tcd2004]

Keep in mind about going to a CBR900RR shock that the 900RR uses a linked suspension. From what I hear about others using the 900RR shock and for myself, the spring is to soft. The CB-1 does not use a linked suspension.

Brian

I'm confused...I thought the reason went to the 900RR shock was to get rid of the softness of the stock shock

[bbanna]

Sorry, I confused two different issues. I was confusing linear and progressive springs with a linked and non linked suspension. They are completely different entities. So for some people the 900RR spring might be to soft and for others it might be just right and yet for others it migh tbe to hard. The spring rate you need is determined by your bike weight plus rider weight plus style of riding you do.

My apoogies for speaking out without thinking first.

Brian

[sparkybloke]

 ;DI allways do matey!!! no worries

[ptlcb1]

tcd2004,
     The reasons for going with a 900RR shock, were the adjustability, because the CB-1 shock has none, (just preload), and they were cheaper than buying a brand new adjustable shock.  The length from eye to eye is almost exact, but the stock 900RR spring is too soft.  The quick fix is to put the CB-1 spring on the 900RR shock.  The proper fix if you want to use the 900RR shock, is to get a spring that has the proper rate for the type of riding you are doing.

[bbanna]

ptlcb1,

Is the stock shock slightly longer oris the 900RR shock longer?

Do you know how approximately how much longer?

Brian

[ptlcb1]

You are testing my memory... lol  IF my memory serves me correctly, the 900RR shock is 4mm longer than the CB-1 shock...Thats not written in stone

Just found it...Page 2 of this section, "Tech Care", thread title is "Rear shock absorber-which to choose".  The second post states that the '93 900RR shock is 4mm longer than the stock CB-1 shock...

[Drewski]

Unless you have eaten way too many pies, or ride pillion often, you can get by on the stock Fireblade shock but you'll have to have it on max stiffness. I'm keeping an eye out for an affordable replacement spring for mine as we talk. I'm not saying I'm slightly overweight but I don't ride pillion very often