Author Topic: kx500sf project  (Read 80453 times)

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Motorrad

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Re: kx500sf project
« Reply #135 on: February 23, 2011, 09:12:56 AM »
Yeap! Pull the pins and swap ends & reinsert. IMO the pins are cheap enough to just replace & I bought a new center valve & will fight with the old one later.

I had to buy another center valve also... as whomever tryed to do the pin flip on mine, while the motor was not in my custody... beat the living crap out of my flapper.... to the point of it not being usable IMO...

Offline jonny500

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Re: kx500sf project
« Reply #136 on: February 23, 2011, 09:13:10 AM »
hi don, the doordie pin flip (what i call it) all is described at 3.3 here http://www.hallbergs.net/kx500/
the pin flip went ok for me about the only thing that has lol
« Last Edit: February 23, 2011, 09:14:44 AM by jonny500 »

Offline kaw rider

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Re: kx500sf project
« Reply #137 on: February 23, 2011, 02:16:54 PM »
I flip a set of pin on a cylinder and they loosen up and jammed up the powervalves and it stuck the powervalves and it was a pain to get out. So i tack weld the pins now.

Offline jonny500

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Re: kx500sf project
« Reply #138 on: February 24, 2011, 05:57:43 AM »
motorrad, my ring gap is 14 thou. so thats good right?

Motorrad

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Re: kx500sf project
« Reply #139 on: February 24, 2011, 05:59:49 AM »
motorrad, my ring gap is 14 thou. so thats good right?

Perfect..  Your golden....

I just ordered 4 sets of rings in hopes one set will measure what yours do...

Offline jonny500

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Re: kx500sf project
« Reply #140 on: February 24, 2011, 06:03:17 AM »
when i put my piston in the bore it feels very lose, is this a forged piston or a 500 thing. i have loads of experience building 2stroke motors but never used a forged piston or built a 500 (they just not very common over here)

Offline kaw rider

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Re: kx500sf project
« Reply #141 on: February 24, 2011, 07:05:07 AM »
I would measure the bore and piston to be sure what you have.

Motorrad

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Re: kx500sf project
« Reply #142 on: February 24, 2011, 08:10:46 AM »
I always check the work of the plater bore etc,..
Not everyone has a bore gauge.

You can kind of fake it with those feeler gauges you have..

Not the best and most accurate way.. But better than closing your eyes and slapping it together...

Offline jonny500

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Re: kx500sf project
« Reply #143 on: February 24, 2011, 08:36:18 AM »
yeah i think you are all totally right. i just dont have the equipment to accuratly measure it here. i can take it some where to have it done, i think i will do that as it better to be safe. this thing has cost alot and i plan on keeping the motor for years to come, i will just keep puting it in newer frames as they come along.

Offline dave916

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Re: kx500sf project
« Reply #144 on: February 24, 2011, 10:33:12 PM »
hi don, the doordie pin flip (what i call it) all is described at 3.3 here http://www.hallbergs.net/kx500/
the pin flip went ok for me about the only thing that has lol


the pin that joins the two section of the centre kips is the same as the pins your flipping,
only ?1.73 each so no real need to flip pins when you can buy new
part no 92043
PIN,4X23.8 ?1.73 

Motorrad

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Re: kx500sf project
« Reply #145 on: February 25, 2011, 01:09:46 AM »
yeah i think you are all totally right. i just dont have the equipment to accuratly measure it here. i can take it some where to have it done, i think i will do that as it better to be safe. this thing has cost alot and i plan on keeping the motor for years to come, i will just keep puting it in newer frames as they come along.

Its alot cheaper to do it right the first time... than do it twice...

Offline jonny500

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Re: kx500sf project
« Reply #146 on: February 25, 2011, 04:45:45 AM »
thanks dave, i have done it now so no need but usfull info. new bearings all round in the bottom end. assembled so far as you can see. just waiting for the new clutch plates to soak over night. should hopfully have the bottom end complete over the weekend

Offline dave916

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Re: kx500sf project
« Reply #147 on: February 26, 2011, 06:11:47 AM »
looks like that crank took a bit of balancing?  did u get it welded or not? chis did not weld mine but i am still thinking about welding (cold) it myself,
is that the head gasket 1mm in picture u are using?
U can get a genuine  0.4mm steel from Cornwall for under 12quid 

{when i sent my barrel with prox piston to langcourt   i sent all clearance etc from cylmer manual }
« Last Edit: February 26, 2011, 06:18:11 AM by dave916 »

Offline jonny500

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Re: kx500sf project
« Reply #148 on: February 26, 2011, 03:17:40 PM »
the crank looks like swiss cheese lol, looks like they had to take alot out. that is a lancourts cylinder, i think they are the best in the U.K so i am sure it will be right but i am going to check it any way. crank not welded i dont think it needs it, time will tell. the gasket it a mitaka, no idea of the thickness i will use it for running in, then lift the head to check every thing and set the squish, how is yours going dave, is it together yet

Motorrad

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Re: kx500sf project
« Reply #149 on: February 26, 2011, 03:24:40 PM »
thanks dave, i have done it now so no need but usfull info. new bearings all round in the bottom end. assembled so far as you can see. just waiting for the new clutch plates to soak over night. should hopfully have the bottom end complete over the weekend

Darn your ahead of me now!...


Looking good..

Crank give you any trouble going in the cases?