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Clubroom => Tech Talk => Topic started by: kdx Geoff on July 30, 2014, 06:14:38 pm

Title: kdx engine in klx frame
Post by: kdx Geoff on July 30, 2014, 06:14:38 pm: l would like a twin shock vinduro bike at some point and thought l would end up with a PE.

A couple of weeks ago l came across a klx frame and wondered if the '83-'85 kdx200 engine would slot into the frame. Space shouldn't be an issue and they're both single downtube frames but lm not sure about the rear engine swingarm area.

Anybody seen or done that conversion ?

Cheers

Geoff
Title: Re: kdx engine in klx frame
Post by: 80-85 husky on July 30, 2014, 07:21:32 pm: funny you should think this way Geoffrey as it has crossed my mind a number of times as great combo. the klx frame handles well but the motors wouldn't pull the top off a rice custard... the kdx 2fitty is the king of 80 - 85 enduro motors

measure up my son measure up....
Title: Re: kdx engine in klx frame
Post by: kdx Geoff on July 30, 2014, 07:39:02 pm: 200 John :)
The 250 frame splits and the exhaust comes straight out the front of the barrel.
Title: Re: kdx engine in klx frame
Post by: Nathan S on July 30, 2014, 07:42:31 pm: It would have to be a good thing.
Question is: will it be better than a KDX200?
Title: Re: kdx engine in klx frame
Post by: Rookie#1 on July 30, 2014, 07:51:29 pm: Quote from: Nathan S on July 30, 2014, 07:42:31 pm

Question is: will it be better than a KDX200?

Probably not, but it will certainly be rarer ;D ;)
Title: Re: kdx engine in klx frame
Post by: 80-85 husky on July 30, 2014, 08:12:48 pm: only interested in a 250 :(
Title: Re: kdx engine in klx frame
Post by: kdx Geoff on July 30, 2014, 08:42:32 pm: Quote from: Nathan S on July 30, 2014, 07:42:31 pm
It would have to be a good thing.
Question is: will it be better than a KDX200?

Doesn't need to be better. Just looking to end up with a twin shock green 2 stroke kdx that's not from the US :)
Title: Re: kdx engine in klx frame
Post by: GMC on July 30, 2014, 08:46:47 pm: Keep in mind that part of the reason the KLX has a reputation as a good handler is because the motor is docile
Title: Re: kdx engine in klx frame
Post by: odd1 on July 30, 2014, 08:56:46 pm: I thought it was the riders !!!
Title: Re: kdx engine in klx frame
Post by: 80-85 husky on July 30, 2014, 10:36:57 pm: its called the xr 200 formula.. everyone can ride an xr 200 fast ;D ;D ;D
Title: Re: kdx engine in klx frame
Post by: GMC on July 31, 2014, 03:42:24 pm: Quote from: odd1 on July 30, 2014, 08:56:46 pm
I thought it was the riders !!!

Yeah, I can run with that ;D

A twin shock KDX 175 has already been done, see VMX mag cover several issues back
Title: Re: kdx engine in klx frame for a kdx200 twin shock
Post by: kdx Geoff on June 08, 2015, 05:38:39 pm: A couple of months ago l bought 2 rather tired klx's for my twin shock kdx200 project. They're remarkably heavy to move around the shed until the motor comes out !

There's plenty of space in the frame for the little 200 motor. The rear engine mount using the swingarm bolt works for the 200 engine in the klx frame. The bolt diameter is correct but there's a small mount width difference of 6mm I'll need to sort.

(http://i1297.photobucket.com/albums/ag23/kdxGeoff/IMAG3449_zpsjpgofycn.jpg) (http://s1297.photobucket.com/user/kdxGeoff/media/IMAG3449_zpsjpgofycn.jpg.html)
(http://i1297.photobucket.com/albums/ag23/kdxGeoff/IMAG3448_zpsmuzagamx.jpg) (http://s1297.photobucket.com/user/kdxGeoff/media/IMAG3448_zpsmuzagamx.jpg.html)

There's a minor issue of clearance for the kickstart knuckle and there might be an issue with the airbox/carb alignment but plenty of room in the frame to work with. It looks like the sprocket alignment is pretty close too.

Time to make some engine mounts.
Title: Re: kdx engine in klx frame
Post by: 80-85 husky on June 11, 2015, 06:51:48 pm: that looks excellent. don't be scared to space the rear mount forward to solve the kick-starter issue. making mounts is easy