Topic: 750K0 forks vs 750K2 forks

[Old Moe Toe]

On the "what pisses me off thread" the other day I mentioned that my brand new (bobbed) front guard/fender from DSS had been dented by coming into contact with the horn on a big bump in the road.(pic 1).
Looking closer into this today I noticed the old guard also had a dent in exactly the same spot.
Looking at my KO there was no such dent there but I noticed there was considerably more room between the horn and the guard. In fact a 33mm difference.
There of course was a similar discrepancy between the guard and the steering lock on both bikes.
On both bikes the fork tubes are in the same place in the top triple tree clamps.
Does anyone know for sure if there was a difference between the length of the fork tubes on these models?.
Pretty sure that progressive springs were put in the bike a few years ago and they were slightly longer than the old springs.
In the meantime in a rough as guts fashion I have "bobbed" the horn to try and stop it happening again , now it matches nicely with the bobbed front and rear fenders, indicators and seat.

[754]

450 forks look very close but a bit shorter, around 20 or 22 ? Mm
And also softer springs I suspect.

Just bringing it up as parts do get switched over the years..

[69cb750]

69 to 72 use same fork tubes, never seen this.
Not CB750 forks ?
Forks raised to handlebar ?

[754]

Measure length from bed of tube to split on the axle hole, and note if  wheel is in air or bike weight is on forks..

[Old Moe Toe]

69 to 72 use same fork tubes, never seen this.
Not CB750 forks ?
Forks raised to handlebar ?

Forks raised to handlebar ? Fork tubes are in the same position in the top triple trees on both bikes.

Frank, both bikes were on the side stand when I measured. I guess getting both front wheels in the air would be interesting to measure. K2 runs a 4 into 1 exhaust which does not work with a center stand so it's a bit of a chore to take the pipes off, fit a center stand etc just to measure. I will try to remember to do it though next time I take the exhaust off. The front fender is already dented so the damage is done.

[Don R]

 I've swapped fork tubes between k0, k1 and k2 bikes. A ratty bike needed new ones so I bought new. Seemed a shame to use them on that bike so I ended up doing a 3 bike fork tube swap. I noticed no difference in the tubes or lengths. Your springs may be toast.
 They used to say cut an inch off of your springs and add a 2 inch pvc pipe spacer on top of the spring.

[Don R]

 I repaired a fender worse than that with a lead shot bag, a round face plastic hammer and several thousand taps.  If you weren't on the opposite side of the planet I'd say bring it over, we could fix it and have a whatever your favorite drink is. 

[Old Moe Toe]

A lead shot bag?. Is this simply what it sounds like Don? How big is the bag and what sized shot would one use. Don't suppose you took a picture.
Not really overly upset about the dent. Things could be way worse in motorcycle terms. Just very curious why one fork set up is longer than the other.

[Old Moe Toe]

I repaired a fender worse than that with a lead shot bag, a round face plastic hammer and several thousand taps.  If you weren't on the opposite side of the planet I'd say bring it over, we could fix it and have a whatever your favorite drink is.

If you weren't on the opposite side of the planet I'd say bring it over, we could fix it and have a whatever your favorite drink is.  That'd be great Don. I'd like to meet so many of you blokes on this forum. Still kicking myself for arriving at the Forum get together in Delores, Colorado a couple of years ago the day everyone had just left.

[Kevin D]

Moe, I did some fork parts list comparing at CMSNL and noted mostly -300- parts for K1, K2 and -341- parts for K3. The biggest difference I noted was the addition of a small rebound spring, and associated parts, to ease topping out, on the later models.

Also noted aftermarket progressive springs offered along with preload spacers as an alternative to original parts. No spring rates mentioned. Photo below.

Is that sunny horn OE?

[PeWe]

Later K2 got the new fork, as used to K6 included.
CMSNL has the serials when old ends and new begins.
Different lower and upper, different caliper holder and fender too.