Differences between 85 and 87 K-bikes? - K-Bikes.com - Excellence in Motion
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post #1 of 21 (permalink) Old Mar 20th, 2011, 10:12 am Thread Starter
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Question Differences between 85 and 87 K-bikes?

Other than the obvious headlight/tail plastic, battery covers, ABS aside; is there any mechanical difference between the early 2 valve K-bikes among 1985 and 1987?

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post #2 of 21 (permalink) Old Mar 20th, 2011, 2:09 pm
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'85 has the hotter Euro cams and a 16 spline final drive .... vs I think 20 spline in 86 +

'85 K100RS
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post #3 of 21 (permalink) Old Mar 20th, 2011, 3:38 pm
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Different fuel level sender - it's up at the left front of the tank on earlier bikes, not rear and center like on later bikes. The tank bolts down at the rear on earlier bikes. No fork brace on earlier bikes. 16 vs 20 splines as mentioned. Not sure if you'd consider it mechanical per se but different peg plates and slightly different exhaust mounting.

I've never seen anything in the parts catalog to indicate there's a difference in the cams. Also, if you look at RealOEM parts fiche the same part numbers show up for a K100RS built in 9/84 (which would be model year 85) as a K100RS built in 9/86.

I've tried several times to find a factual basis to support the notion of the earlier bikes having "hottter" cams but have failed to find anything.

Not saying it isn't true, just that I've never been able to substantiate it with anything factual.
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post #4 of 21 (permalink) Old Mar 20th, 2011, 7:19 pm Thread Starter
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Question

Are the tail plastic interchangeable between the 83-85 and 87 on-ward K-bikes?

Probably would require different seat and battery covers, too if I change the tail plastic of a 85 to 87 model.

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post #5 of 21 (permalink) Old Mar 20th, 2011, 8:35 pm
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Quote:
Originally Posted by cat0020
Are the tail plastic interchangeable between the 83-85 and 87 on-ward K-bikes?

Probably would require different seat and battery covers, too if I change the tail plastic of a 85 to 87 model.
Yes, you should be able to retrofit a newer tail.
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post #6 of 21 (permalink) Old Mar 20th, 2011, 8:52 pm Thread Starter
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Question

Any tricks to quiet the squealing front brakes?

Seems to be louder when brakes are applied conservatively, no noise during hard braking.

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post #7 of 21 (permalink) Old Mar 20th, 2011, 9:04 pm
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Quote:
Originally Posted by cat0020
Any tricks to quiet the squealing front brakes?

Seems to be louder when brakes are applied conservatively, no noise during hard braking.
Haven't you heard, "LOUD BRAKES SAVE LIVES!"

Seriously, you could try I think it's called "DiscBrake Quiet" , sold at auto parts stores. Helped me a bit. I didn't even know the rear brake was a real squealer until my neighbor mentioned it to me. I pulled out my earplugs and said, "Huh?"
Steve
1990 K75RT
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post #8 of 21 (permalink) Old Mar 20th, 2011, 9:14 pm
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chu chu chu chu changes

When I bought my RS in 86 the dealership claimed there was in excess of 100 changes from the 85 model, not to suggest dealers can be trusted or the changes being significant.

...my brakes don't squeak, had a set of pads that did that decades ago but I changed em.
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post #9 of 21 (permalink) Old Mar 20th, 2011, 11:09 pm
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Quote:
Originally Posted by FlyingDuck

I've tried several times to find a factual basis to support the notion of the earlier bikes having "hotter" cams but have failed to find anything.

.
The 85 K100's supposedly were rated at 100hp, vs 90 hp for the 86. Wether this was from hotter cams, compression, or wishful thinking I have no idea. The 85 also had 2 low fuel warning lights, coming on at about 4 and 1 liters respectively.

1987 RED K75S
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post #10 of 21 (permalink) Old Mar 21st, 2011, 7:01 am
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Quote:
Originally Posted by stevemac829
Haven't you heard, "LOUD BRAKES SAVE LIVES!"

Seriously, you could try I think it's called "DiscBrake Quiet" , sold at auto parts stores. Helped me a bit. I didn't even know the rear brake was a real squealer until my neighbor mentioned it to me. I pulled out my earplugs and said, "Huh?"
Steve
1990 K75RT
I've been using this stuff on cars and bikes for 30 years and it does work.

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