I bought a 1991 KX125 frame with a grenaded 1990 KDX200 engine in it for $150. I have a 1999 KDX220 bike, what are the odds that the H-series bolt holes line up (except for the head stay)? The hybrid has a leaky rear shock and missing a radiator. I love my other KDX200H, I really want to try a hybrid, but not sure i want to disassemble my 220 for an old 1991 chassis. I am 6" and 230, but the 91 chassis seems as big as the KDX to me, and these old chassis seem comfy as well. Thoughts and opinions?
Thanks All
99 KDX engine swap into old E-series hybrid?
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- Julien D
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Re: 99 KDX engine swap into old E-series hybrid?
I'd say it would probably fit. May have some pipe fitment issues, but probably nothing major.
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99 KDX engine swap into old E-series hybrid?
Thanks Julien,
I don't care about the pipe, I can fab that, they just have a nice powercoating on the frame that I don't really want to mess up with new brackets.
Is the 91 a good chassis? I have searched on the forums quite a bit and most use the newer chassis, it seems the consensus is the 94-98 have the comfy seats (I'm 41 and overweight) and larger chassis. 91 fit this bill as well, or is the 94-98 a much better candidate? I guess I'm on the fence whether to try to score a 94-98 or spend a little money fixing up the run down 91.
I don't care about the pipe, I can fab that, they just have a nice powercoating on the frame that I don't really want to mess up with new brackets.
Is the 91 a good chassis? I have searched on the forums quite a bit and most use the newer chassis, it seems the consensus is the 94-98 have the comfy seats (I'm 41 and overweight) and larger chassis. 91 fit this bill as well, or is the 94-98 a much better candidate? I guess I'm on the fence whether to try to score a 94-98 or spend a little money fixing up the run down 91.
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99 KDX engine swap into old E-series hybrid?
If an E series has already been in the frame then your H should bolt right in and the sprocket should line up no problem. The KIPS takes up a little more room towards the front so check your clearance. Fab a head mount, hook up the radiators and you should be in business. Here's a link to my first hybrid build (e series in 90 kx125 frame). If you revalve your suspension you'll never miss the H frame. Even a 90 kx125 frame is light years ahead of the boat anchor E and H bikes, lighter with much better suspension. Once mine was done my KDX220 with revalved shock and USD's immediately became a loaner bike and was sold shortly after that. The pipe really isn't much of a problem to fab. Here's a link to the build http://kdxrider.net/forums/viewtopic.php?f=111&t=6270. I used a larger aftermarket tank and had to "mold" the bottom to clear the cylinder some, yours may need some additional tweaking with the different topend but again not a big deal.
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99 KDX engine swap into old E-series hybrid?
Dang, I had forgotten how awesome that bike turned out Marrk! I gotta find a motor for this 94 125.
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99 KDX engine swap into old E-series hybrid?
Thanks marrk_us for the good info!
I just dropped the H cylinder on the E engine and it is a no-go. As you stated, the KIPS hits the frame.....Bummer . Now I need to find a complete topend for the E as the cylinder is wasted, missing some of the KIPS parts, and rod is bent. Cheaper to buy an E bike donor. The other option is to raise the front of the H engine to pivot it away from the frame, but that would require new mounts and drive the head more into the tank. hum......
Has anyone put an H motor in an older KX125? I have searched images till I am seeing cross-eye...I can't find one.
I just dropped the H cylinder on the E engine and it is a no-go. As you stated, the KIPS hits the frame.....Bummer . Now I need to find a complete topend for the E as the cylinder is wasted, missing some of the KIPS parts, and rod is bent. Cheaper to buy an E bike donor. The other option is to raise the front of the H engine to pivot it away from the frame, but that would require new mounts and drive the head more into the tank. hum......
Has anyone put an H motor in an older KX125? I have searched images till I am seeing cross-eye...I can't find one.