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Old 05-07-2013, 04:48 PM   #8011
kirbi69
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sounds like a good deal. for a good tank .

I went with the IMS 4 gallon tank, a good compromise in my opinion. it works great!

the Clarke tank I bought didn't fit good at all. I had to return it. ive heard they sometimes have problems with the way they put the mounting holes in. but I took a gamble anyways, and lost :S
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Old 05-07-2013, 06:15 PM   #8012
voltz
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Quote:
Originally Posted by mcma111 View Post
I'm pretty darn sure that the case hole size is the same for the XR600 as the XL600. I've gotten rid of all of my XL and XR cylinders so I don't have anything to measure except a set of XR cases. I do know when I put the 102mm piston in my XR that it required a larger sleeve.
what capacity did the 102 give and who made the piston ?
were you happy with the outcome etc ?
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Old 05-07-2013, 06:16 PM   #8013
mrfixit54016
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Quote:
Originally Posted by kirbi69 View Post
sounds like a good deal. for a good tank .

I went with the IMS 4 gallon tank, a good compromise in my opinion. it works great!

the Clarke tank I bought didn't fit good at all. I had to return it. ive heard they sometimes have problems with the way they put the mounting holes in. but I took a gamble anyways, and lost :S

I happen to have an IMS for sale in the flea market right now...
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Old 05-07-2013, 07:35 PM   #8014
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Quote:
Originally Posted by voltz View Post
what capacity did the 102 give and who made the piston ?
were you happy with the outcome etc ?
Hey Geoff,

Not sure if you know, but here's the formula for calculating the capacity of our motors (just the volume of a cylinder formula):

radius of the piston squared multiplied by pi multiplied by the stroke (Our stroke is 80mm)

I usually convert to cm so I don't have to convert from cubic mm to cubic cm at the end. Doesn't matter either way.



So for the stock piston that is 97mm it would be:

97/2 = 48.5mm radius or 4.85cm

4.85^2*pi*8

=591.18cc


For a 102mm piston:

102/2 = 51mm radius

5.1^2*pi*8

=653.7cc


Hope this helps,

Cheers

John
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Old 05-07-2013, 08:08 PM   #8015
voltz
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Quote:
Originally Posted by Captain115 View Post
Hey Geoff,

Not sure if you know, but here's the formula for calculating the capacity of our motors (just the volume of a cylinder formula):

radius of the piston squared multiplied by pi multiplied by the stroke (Our stroke is 80mm)

I usually convert to cm so I don't have to convert from cubic mm to cubic cm at the end. Doesn't matter either way.



So for the stock piston that is 97mm it would be:

97/2 = 48.5mm radius or 4.85cm

4.85^2*pi*8

=591.18cc


For a 102mm piston:

102/2 = 51mm radius

5.1^2*pi*8

=653.7cc


Hope this helps,

Cheers

John
thanks John,
I knew there was a formula but it's been a long time since I used it :eek:
looks like the 654 I had heard bout was the 102mm oversize
thanks for your post,sometimes it's all too easy to just ask questions instead of
looking things up
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Old 05-07-2013, 09:14 PM   #8016
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John
I found this calculation while doing some reading
obviously just a different way of doing what you said maybe a little easier to remember
Engine displacement = bore X bore X stroke X 0.7854 X number of cylinders
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Old 05-07-2013, 10:48 PM   #8017
Alaskajeff
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Advice needed on rear sprocket / hub dilemma

So after a 2 year wait I am FINALLY getting a Kush Sprocket sent to me for my 88 XR6. The dilemma is that they are currently making this batch to fit 91-00 models. Which means that the inner diameter of the Kush sprocket is 125mm and the 88-90 wheel hub is 130mm...........So which do I have milled down, the new sprocket inner diameter OR the wheel hub outer flange? PLEASE help me decide.





-----------------------------------------------------------------------------



Honda 520 Kush sprocket.


Suits models:


HONDA 2 (counterbored to suit M10)
XR 600
91-00
XR 650 L
93-09




Dimensions:
153 mm BCD to suit 6x M10 bolts
125 mm center hole.


What is the benefit of a Kush® sprocket with inbuilt cushioning? Considerably longer gear life, less chain and sprocket wear and less wheel hop during compression braking (for off-road, supermoto/motard and enduro bikes ridden on road without a cushioning hub). Kush sprockets were designed as a replacement for the cushioning hub (cush-drive, cush or dampening hub) common in most road going versions of enduro/dual sport motorcycles.
Kush sprockets use a patented design to allow the outer toothed ring to revolve on the inner aluminium plate, using polyurethane dampening to absorb piston pulse, shock loads and vibration. Kush sprockets are engineer designed and tested in Australia. Utilising nitride hardened SCr440 alloy steel, 7075 Aluminium central carrier and high performance polyurethane elastomer dampeners, Kush sprockets provide exceptional high-cycle endurance and durability for all riding conditions.
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Old 05-08-2013, 01:05 AM   #8018
Royal Club
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but, even if you mill the sprocket or the hub itself. the boltholes won't align...
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Old 05-08-2013, 02:27 AM   #8019
RoostMaster
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Laugh

Quote:
Originally Posted by Captain115 View Post
Hey Geoff,

Not sure if you know, but here's the formula for calculating the capacity of our motors (just the volume of a cylinder formula):

radius of the piston squared multiplied by pi multiplied by the stroke (Our stroke is 80mm)

I usually convert to cm so I don't have to convert from cubic mm to cubic cm at the end. Doesn't matter either way.



So for the stock piston that is 97mm it would be:

97/2 = 48.5mm radius or 4.85cm

4.85^2*pi*8

=591.18cc


For a 102mm piston:

102/2 = 51mm radius

5.1^2*pi*8

=653.7cc


Hope this helps,

Cheers

John
Captain,
that calculates my 'Kenworth 1300 kit' (low comp, 142mm) to be 1284.8cc's.... I got ripped off 15.2cc's ! Don't buy this kit ! OR get that Pi guy to adjust his Pi thingy....


I'll post after it's in...
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Old 05-08-2013, 02:31 AM   #8020
voltz
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Quote:
Originally Posted by Royal Club View Post
but, even if you mill the sprocket or the hub itself. the boltholes won't align...
I was thinking the same
I have never heard of these Kush sprockets : before
Something else to look into
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Old 05-08-2013, 05:10 AM   #8021
Alaskajeff
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Quote:
Originally Posted by Royal Club View Post
but, even if you mill the sprocket or the hub itself. the boltholes won't align...
I noticed that too but with only 3mm difference from BCD I will be able to drill them out to fit pretty easily. Or at least thats what I'm telling myself.
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Old 05-08-2013, 01:00 PM   #8022
Royal Club
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but what about the counterbore?
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Old 05-08-2013, 01:33 PM   #8023
mcma111
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Bottom line. Don't do it...
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Old 05-08-2013, 02:38 PM   #8024
voltz
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Chaingang sprockets

it's no Kush drive but supposedly these sprockets outlast others by far,
might be worth a look
http://www.chaingangchainsandsprockets.com.au/
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Old 05-08-2013, 03:00 PM   #8025
Captain115
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Quote:
Originally Posted by RoostMaster View Post
Captain,
that calculates my 'Kenworth 1300 kit' (low comp, 142mm) to be 1284.8cc's.... I got ripped off 15.2cc's ! Don't buy this kit ! OR get that Pi guy to adjust his Pi thingy....


I'll post after it's in...
Ahhh, bastards they're ripping you off haha. I always think it's amusing that engine capacities are often rounded up...though I guess XR600 flows better than XR591.

Quote:
Originally Posted by voltz View Post
John
I found this calculation while doing some reading
obviously just a different way of doing what you said maybe a little easier to remember
Engine displacement = bore X bore X stroke X 0.7854 X number of cylinders
Thanks Geoff, that is definitely easier! I am maths tutor so just went with the standard all cylinder volume formula (area of base x height) but your way is quicker to calulate an approximate value in my head.

Cheers,
John

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