Project Clapped out 1998 KX250... What works? Turbo Crank?

Bike Builds and rebuilds. Post pics and discuss your projects.
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60something
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Re: Project Clapped out 1998 KX250... what works?

Post by 60something » Sat Mar 17, 2018 11:16 pm

Hey, in HVAC lingo, we call that a squirrel cage blower! Airflow 101 I guess :)
I don't know half of you half as well as I should like, and I like less than half of you half as well as you deserve.

2006 KDX200 qty-2
1987 KX500
1991 CB750 Nighthawk
1973 H2 750 Triple - gone but not forgotten

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Sandblaster
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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Sat Mar 17, 2018 11:34 pm

Lol... That sounds about right...
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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Sun Mar 18, 2018 4:08 am

I like it :lol:


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Sandblaster
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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Wed Apr 18, 2018 2:11 am

Getting the cases ready..


JT Engine Works prepping the cases.jpg
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Sandblaster
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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Fri Apr 20, 2018 2:44 pm

Ok... Most of the parts are in so Jason is getting the cases put back together.


KX GURU STEVE PARRIS TURBO CRANK BUILD 101.jpg
KX GURU STEVE PARRIS TURBO CRANK BUILD 101.jpg (477.68 KiB) Viewed 1039 times


If nothing else this engine will look sweet :lol:


KX GURU STEVE PARRIS TURBO CRANK BUILD 102.jpg
KX GURU STEVE PARRIS TURBO CRANK BUILD 102.jpg (434.37 KiB) Viewed 1039 times

KX GURU STEVE PARRIS TURBO CRANK BUILD 103.jpg
KX GURU STEVE PARRIS TURBO CRANK BUILD 103.jpg (467.37 KiB) Viewed 1039 times
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Sandblaster
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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Sun Apr 22, 2018 2:49 pm

Here is a few more pics..


JT ENGINE WORKS KX GURU RACING 1998 KX250 ENGINE BUILD 101.jpg
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JT ENGINE WORKS KX GURU RACING 1998 KX250 ENGINE BUILD 102.jpg
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JT ENGINE WORKS KX GURU RACING 1998 KX250 ENGINE BUILD 103.jpg
JT ENGINE WORKS KX GURU RACING 1998 KX250 ENGINE BUILD 103.jpg (132.04 KiB) Viewed 1030 times
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long_av8r
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Re: Project Clapped out 1998 KX250... what works?

Post by long_av8r » Mon Apr 23, 2018 12:26 am

Other than the sheer sexiness of it, and the fact that polishing removes surface imperfections that can be a starting point for cracks, is there anything else to gain from polishing the rod like that? What did you use to get those results? A wheel and rouge, or did you sand it with a belt sander first and then polish? Same thing for the crank?

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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Mon Apr 23, 2018 2:38 am

long_av8r wrote:
Mon Apr 23, 2018 12:26 am
Other than the sheer sexiness of it, and the fact that polishing removes surface imperfections that can be a starting point for cracks, is there anything else to gain from polishing the rod like that? What did you use to get those results? A wheel and rouge, or did you sand it with a belt sander first and then polish? Same thing for the crank?
You hit the nail on the head... No special gains from polishing the rod.
With Wossner rods the chances of having a failure are slim to none.
So, why do it?
Since I don't get involved in a lot of builds I like mine to look their best.
And Jason who is building this engine feels the same.

Also, if you send a crank off to have it rebuilt and it is grimy and nasty, it will likely come back that way, except.. it will have a new rod on it :lol:
So, we do ours up.

Polishing starts with 80 or 120 grit to remove the raised lettering and any casting flaws (Wossner has very few) mostly in the recessed area where the lettering is.
Then we move on to 220 grit.
When done with 220, it should be looking pretty shiny.
Then I like to use a buffing wheel with green rouge.

It's a little time consuming but sure pops on the forums, Facebook, ect 8-)
If bikes are for kids I'll never grow up.

long_av8r
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Re: Project Clapped out 1998 KX250... what works?

Post by long_av8r » Sat Apr 28, 2018 11:14 pm

Cool, that was what I thought you were going to say, pride in workmanship... Rare these days, but I have a guy I take my stuff to here in Temecula (he's actually in Murrieta) and other than myself, he's the only one I've trusted for years. He's shown me some polished transmissions he's done that have come out like jewels. Very nice work. He's the one that normally does my crank work, and they've never come back dirty. :D But what I see here is interesting and I'm looking forward to some numbers.

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Re: Project Clapped out 1998 KX250... what works?

Post by Sandblaster » Sun Apr 29, 2018 3:41 am

My guess is late next week to early the following we should have some results..
If bikes are for kids I'll never grow up.

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