PilotOdyssey.com :: View topic - my old HONDASAKI rebuild

Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use?

Mudbogger wrote:

Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use?

stock oddy crank and rod,, the top end from base gasket up is stock kawa KX250 ,, kx piston and pin (same size as honda pin) just lots of welding on the cases to make them wider and move the cylinder studs out,, then match all the transfer port area and such. you will probably notice the bearing oil holes where filled, as i used sealed bearings. for raceing (less turbulance in the bottom end) they worked fine, but now have opened them again and going back to open bearings ??

This is cool! I am interested in doing this myself. Please keep us posted on the rebuild process and how it runs.
For non racing application I would definitely not use sealed bearings. Try and find the best bearings you can though.
Has anybody ever thought about or used ceramic bearings?

I have a couple fl250's and am doing a cr250m top end on one right now, but had heard about this before too... might have to start looking for parts!
I have heard the honda bottom end doesn't like the extra power/higher R's
Are you going to rebuild the crank? Weld it? Balance it? What else could be done to make the lower end stronger?

FYI KXT250 84-85 is same top end as well.

-Pete

oddynutz wrote:

Mudbogger wrote:

Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use?

MacDizzy did the sealed bearing thing on his FL250 years ago said the heat finally got to them they were sort lived but if its a race Engine longevity is not something that is sought after as much as performance, he was looking to stuff the bottom end more than the turbulence thing, from what I remember him saying from that experience is the sealed bearings are not something a recreational rider would want to do.

Author:	oddynutz [ Fri Jul 18, 2014 6:20 pm ]
Post subject:	my old HONDASAKI rebuild
gettin the old HONDASAKI out of mothballs and rebuilding her,, in an old highly modified Chalenger SS chassis,, full rebuild of motor (( Internal Combustion Engine ? )) and going to put A-arm suspension up front from Suki 400 quad.

Author:	mudbogger [ Sat Jul 19, 2014 5:13 pm ]
Post subject:	Re: my old HONDASAKI rebuild
Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use?

Author:	oddynutz [ Thu Jul 24, 2014 4:36 am ]
Post subject:	Re: my old HONDASAKI rebuild
Mudbogger wrote: Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use? stock oddy crank and rod,, the top end from base gasket up is stock kawa KX250 ,, kx piston and pin (same size as honda pin) just lots of welding on the cases to make them wider and move the cylinder studs out,, then match all the transfer port area and such. you will probably notice the bearing oil holes where filled, as i used sealed bearings. for raceing (less turbulance in the bottom end) they worked fine, but now have opened them again and going back to open bearings ??

Author:	hoser [ Thu Jul 24, 2014 6:14 pm ]
Post subject:	Re: my old HONDASAKI rebuild
oddynutz wrote: Mudbogger wrote: Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use? stock oddy crank and rod,, the top end from base gasket up is stock kawa KX250 ,, kx piston and pin (same size as honda pin) just lots of welding on the cases to make them wider and move the cylinder studs out,, then match all the transfer port area and such. you will probably notice the bearing oil holes where filled, as i used sealed bearings. for raceing (less turbulance in the bottom end) they worked fine, but now have opened them again and going back to open bearings ?? MacDizzy did the sealed bearing thing on his FL250 years ago said the heat finally got to them they were sort lived but if its a race Engine longevity is not something that is sought after as much as performance, he was looking to stuff the bottom end more than the turbulence thing, from what I remember him saying from that experience is the sealed bearings are not something a recreational rider would want to do.

Author:	cncpete [ Thu Aug 28, 2014 7:30 pm ]
Post subject:	Re: my old HONDASAKI rebuild
This is cool! I am interested in doing this myself. Please keep us posted on the rebuild process and how it runs. For non racing application I would definitely not use sealed bearings. Try and find the best bearings you can though. Has anybody ever thought about or used ceramic bearings? I have a couple fl250's and am doing a cr250m top end on one right now, but had heard about this before too... might have to start looking for parts! I have heard the honda bottom end doesn't like the extra power/higher R's Are you going to rebuild the crank? Weld it? Balance it? What else could be done to make the lower end stronger? FYI KXT250 84-85 is same top end as well. -Pete

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my old HONDASAKI rebuild http://www.pilotodyssey.com/PO/viewtopic.php?f=5&t=14509	Page 1 of 1

Author:	oddynutz [ Wed Dec 03, 2014 12:20 am ]
Post subject:	Re: my old HONDASAKI rebuild
cncpete wrote: This is cool! I am interested in doing this myself. Please keep us posted on the rebuild process and how it runs. For non racing application I would definitely not use sealed bearings. Try and find the best bearings you can though. Has anybody ever thought about or used ceramic bearings? I have a couple fl250's and am doing a cr250m top end on one right now, but had heard about this before too... might have to start looking for parts! I have heard the honda bottom end doesn't like the extra power/higher R's Are you going to rebuild the crank? Weld it? Balance it? What else could be done to make the lower end stronger? FYI KXT250 84-85 is same top end as well. -Pete the bottom end is stock,, works just great we raced them like this with no problems,, with big bore cylinders the stock crank couldnt take the added hp,, this Engine was putting our about 50hp, only thing you need to do is weld the crank-pin to keep the crank from twisting in the fly-wheels.. the later kx top ends will work as long as it does not have the power-valve exhaust .

Author:	oddynutz [ Wed Dec 03, 2014 12:25 am ]
Post subject:	Re: my old HONDASAKI rebuild
hoser wrote: oddynutz wrote: Mudbogger wrote: Interesting, any more details please? Crank OEM with aftermarket rod? What piston does it use? stock oddy crank and rod,, the top end from base gasket up is stock kawa KX250 ,, kx piston and pin (same size as honda pin) just lots of welding on the cases to make them wider and move the cylinder studs out,, then match all the transfer port area and such. you will probably notice the bearing oil holes where filled, as i used sealed bearings. for raceing (less turbulance in the bottom end) they worked fine, but now have opened them again and going back to open bearings ?? MacDizzy did the sealed bearing thing on his FL250 years ago said the heat finally got to them they were sort lived but if its a race Engine longevity is not something that is sought after as much as performance, he was looking to stuff the bottom end more than the turbulence thing, from what I remember him saying from that experience is the sealed bearings are not something a recreational rider would want to do. the sealed bearings worked fine even for rec riding,, only had problem when the riding the desert when the air temp got over 90 degrees and running hard..

Author:	hoser [ Mon Dec 08, 2014 1:58 pm ]
Post subject:	Re: my old HONDASAKI rebuild
cncpete wrote: This is cool! I am interested in doing this myself. Please keep us posted on the rebuild process and how it runs. For non racing application I would definitely not use sealed bearings. Try and find the best bearings you can though. Has anybody ever thought about or used ceramic bearings? I have a couple fl250's and am doing a cr250m top end on one right now, but had heard about this before too... might have to start looking for parts! I have heard the honda bottom end doesn't like the extra power/higher R's Are you going to rebuild the crank? Weld it? Balance it? What else could be done to make the lower end stronger? FYI KXT250 84-85 is same top end as well. -Pete Kart racing guys swear by the ceramic bearings but the big thing with the kart guys is they are looking for every little bit of HP they can get, the ceramic bearings last longer and roll easier but are also very expensive.

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