what you think about this

Well give a guy a key board and who knows what he will type i guess, i was looking for comments on the bike i do not care if you like my avitar pic

and as for the ninja hard tail i had 2 sets of shocks 1 93 kz 1000p and the ninja shocks the kz were to long so i used the ninja ones

How much ground clearance have you got there?

floivanus wrote: I'm trying to figure out the rigid (no suspension crappy ride) and ninja forks (upgraded handling and modern ride) mashup

I agree

Your topic reads " what do you think about this" lot of variables there, and you really don't want my honest opinion on the" soon too be on CL " bobber, chopper whatever it is .......................so i will play nice about it. The modern day front end doesn't work with the the hardtail- period. Either it's chopper or a fighter you can't mix both Put an old girder or springer front end on it and make chopper or mono shock the rear and make a fighter or push it to the curb, I had to toss that in , again you asked

In looking at the bare frame, I'd be very concerned about excessive flex and twist. I realize that you are not building a canyon carver, but I'm pretty sure you don't want a bike that gets all wibbly-wobbly at speed. Two areas really stand out to me.
The backbone. The early Z's were not known for particularly stiff frames, and this is one area that Kawasaki made significant changes to over the years. The late-model police bikes have what is probably the stiffest road-going KZ frame made by the factory. It has a triple, triangulated backbone with three sets of cross-tubes connecting the long ones.
The ZRX uses a single backbone tube, but it is enormous.
The front down tubes. Kawasaki added two cross braces in front of the engine to reduce twist and flex in this area.
The single vertical tube you added behind the engine is a really good idea, but it looks curved in the pic. While that can be aesthetically pleasing, a curve there will allow the tube to flex much more easily than would a straight tube.

Her is a KZP frame for reference

i have about 4" of clearance, i can lean the bike till the foot peg hits is the first thing that does

and thank you for being honest i wouldn't ask if i didn't want to know i always look for opinions and different points of view

If you've ever been in a high speed wobble at 80-100 MPH, you will know what we mean. These bikes get there in a heart beat.
Steve

TexasKZ wrote: In looking at the bare frame, I'd be very concerned about excessive flex and twist. I realize that you are not building a canyon carver, but I'm pretty sure you don't want a bike that gets all wibbly-wobbly at speed. Two areas really stand out to me.
The backbone. The early Z's were not known for particularly stiff frames, and this is one area that Kawasaki made significant changes to over the years. The late-model police bikes have what is probably the stiffest road-going KZ frame made by the factory. It has a triple, triangulated backbone with three sets of cross-tubes connecting the long ones.
The ZRX uses a single backbone tube, but it is enormous.
The front down tubes. Kawasaki added two cross braces in front of the engine to reduce twist and flex in this area.
The single vertical tube you added behind the engine is a really good idea, but it looks curved in the pic. While that can be aesthetically pleasing, a curve there will allow the tube to flex much more easily than would a straight tube.

I think that top tube that forms the backbone will act as a mono shock for the rear suspension that isn't supposed to be there and have every thing twisting around as it does so. Definitely more metal and triangulation is needed there, if nothing else the flex will put load on the motor as it tries to stop the frame movement. While it's not my sort of bike, I admire what you are trying to do and I think you have some good stuff in the overall idea, it just needs some attention to some details for it to be a successful ride IMO.

i really like the frame.
if this bike with a built turbo engine and big enough rear tire to hook hasn't broken it's frame yet(and it hasn't)



i don't think this frame(providing it was built with the proper materials) is going to experience anything any different than any other single backbone chopper style frame out there.of which there are plenty with high horsepower twins and inlines...

i am no fan of the tank seat fender treatment,but it ain't my ride either.

but i kinda like short usd front ends on rigids myself,kinda gives em a street racer look imho,

i do like my choppers 70's style tho also,



leon

wow thats a very cool bike

doing some paint

some paint