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August 18th, 2017, 09:26 AM   #1
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I Ride: Husaberg 650 fe 03
Husaberg 650 cranksaft clearance adjusting start 0.28

Finally i am rebuild 03 650 engine back together,i put rollerbearings both crankcases,i measured connection rod Lateral play was 0.5mm.

When i got cranksaft and crankcases tighten and measured Lateral play on cranksaft dial gauge i got reading 0.28 so i need more space to get 0.55-0.65 lateral play,where i can get more space? So is it clue only way sealed crankcases together or could i make paperseal 0.3mm thick or should i machine metal cranksaft etc?
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August 18th, 2017, 02:09 PM   #2
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If there are no shims left to take out then yes you need to machine the bearing bores deeper. It's common on the early cases

You should aim for 0.6-0.7mm crank axial play.

The machining is easy and setup is not very critical because the bearing outer race has a big radius on its corner. Ie you don't need the machined part of the case to be exactly concentric to the existing bearing bore.

We can't space the cases apart because the liner won't fit afterwards

You could machine or grind one or both of the main bearing inner races instead but then you will have to do that every time
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August 19th, 2017, 02:51 AM   #3
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Thanks advice i think its easiest way to grind main bearing inner races that was one option belive or not.

I also need to know what is cranksaft Crank Primary Gear bolt torque moment also sylinderhead?
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August 19th, 2017, 03:03 AM   #4
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your con rod only needs around 0.4mm float, check this again out of the engine, do it carefully, you may find you have much more.

next, check behind the balancer for a shim hidden here.

finally, when this happens to me I'm a little cheeky and I grind the back of the inner race myself very carefully against the side face of my bench grinder (also known as a wall grinder) by grinding every 1/4 for a dab, turn, dab, turn dab. hot fingers! hot fingers! use a very-near caliper and adjust accordingly. you are only talking about 0.1-0.2mm so it isn't too bad.

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August 19th, 2017, 03:32 AM   #5
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I measured con rod 0.5 cauge slide easy and i check behind balanser no shims there.
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August 19th, 2017, 05:51 AM   #6
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If you go for 0.6 to 0.7 mm crank axial play the rod needs 0.5 axial play absolute minimum

Unless your building it for an old woman to ride to church on Sunday's
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August 19th, 2017, 07:06 AM   #7
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Nooo i allready ported and finished seat area get hopefully more power,Some say that oil pressure drops too low on con rod if axial play get too big??

I read that athena have some ignition unit wich get more revs power?has anybody better information tuning programs?

Last edited by Jussi; August 19th, 2017 at 07:16 AM.
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August 19th, 2017, 07:32 AM   #8
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I do a better ignition advance! we've only had about 6 people have it but i know they found more midrange and snap.

you can't lose oil pressure like that on a roller bearing crank.

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August 19th, 2017, 11:13 PM   #9
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I got it last night axial play ok but endet use allmost all shim plates,probably cranksaft neck carry shims so ai ended crind bit too much when i notised this i put all shims balancer side better luck next time after 300h?

I checked sparepart picture that i got local huski dieler shims are different diameter both sides,flywheel side is inside diameter is 0.5 0.7 larger hopefully this help other avoid same mistake.

Last edited by Jussi; August 19th, 2017 at 11:27 PM.
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August 30th, 2017, 01:48 AM   #10
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Hi what might be torque newton metres cranksaft Crank Primary Gear bolt torque moment also sylinderhead?
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