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Old 10-25-2012, 10:47 AM   #6076
nikolic
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Me too :) I also want to know what's the diference in crankshafts and pistons!
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Old 10-25-2012, 11:08 AM   #6077
elsalvadorklr
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Quote:
Originally Posted by Ivanych View Post
Silence ...... All are silent!
Keep a secret?????
I'm ignoramus, but I want to know.
like many have said BEFORE

different PART NUMBERS DOES NOT MEAN DIFFERNT PARTS!

I suspect that for some reason older parts even though the same have higher prices than new

I have conformed this on some parts that are intercheangeable on my 88 bike and buying newer parts from 2000xr models

one example, bearings, second example pulse generator and coils

just one of those things

for all accounst and purposed all XRL, XR600 SINGLE CARB HEADS ARE ALL INTERCHANGEABLE!

HOWEVER you have to plug up the smog holes if using an xrl head on the xr600, also the xrl head has no decompressor assembly...a lot if xr650l riders use an xr600 head so they can use the manual decompressor when adapting the kickstart mechanism to their bikes

hope this helps

elsalvadorklr screwed with this post 10-25-2012 at 11:13 AM
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Old 10-25-2012, 11:10 AM   #6078
elsalvadorklr
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Quote:
Originally Posted by nikolic View Post
Me too :) I also want to know what's the diference in crankshafts and pistons!
there is no difference in 88-2000 crankshafts

87 pistons and older have a longer skirt and longer piston pin

Im using a 87 piston and pin in an 88 xr600

this is the only difference

one nice thing about 87 pistons is they are lighter than 88 and up pistons, and they also have more oil holes to cool the piston skirt...

also to note is that the 87 piston pin is longer however it weighs less than the shorter 88 and up piston pins

I like t think that the longer piston skirt helps with compression and preventing oil loss...also it will rattle less! jajaja
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Old 10-25-2012, 11:17 AM   #6079
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Quote:
Originally Posted by elsalvadorklr View Post
l
for all accounst and purposed all XRL, XR600 SINGLE CARB HEADS ARE ALL INTERCHANGEABLE!
Unless you count fact that theres holes in the XRL head's for the smog BS....

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Old 10-25-2012, 11:25 AM   #6080
mcma111
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Quote:
Originally Posted by elsalvadorklr View Post


for all accounst and purposed all XRL, XR600 SINGLE CARB HEADS ARE ALL INTERCHANGEABLE!
Different combustion chamber due to 97-100mm bore
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Old 10-25-2012, 11:27 AM   #6081
elsalvadorklr
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Quote:
Originally Posted by MentalGuru View Post
Unless you count fact that theres holes in the XRL head's for the smog BS....

see next post...

plug them up if using an xrl head on the xr6

and use the same size xrl piston and bore...geeze nitpickers

cheers
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Old 10-25-2012, 11:31 AM   #6082
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Quote:
Originally Posted by elsalvadorklr View Post
see next post...

plug them up if using an xrl head on the xr6

and use the same size xrl piston and bore...geeze nitpickers

cheers
The next post says the "Different combustion chamber due to 97-100mm bore"

Why should I see that...

So you edited the post after I after I started to quote your response... Got me....


BTW, if your only 99.9% sure. You don't know then....


MentalGuru screwed with this post 10-25-2012 at 11:36 AM
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Old 10-25-2012, 11:38 AM   #6083
Ivanych
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Quote:
Originally Posted by elsalvadorklr View Post
like many have said BEFORE

different PART NUMBERS DOES NOT MEAN DIFFERNT PARTS!

I suspect that for some reason older parts even though the same have higher prices than new

I have conformed this on some parts that are intercheangeable on my 88 bike and buying newer parts from 2000xr models

one example, bearings, second example pulse generator and coils

just one of those things

for all accounst and purposed all XRL, XR600 SINGLE CARB HEADS ARE ALL INTERCHANGEABLE!


HOWEVER you have to plug up the smog holes if using an xrl head on the xr600, also the xrl head has no decompressor assembly...a lot if xr650l riders use an xr600 head so they can use the manual decompressor when adapting the kickstart mechanism to their bikes

hope this helps
Thank you very much!
I know it was a lot of talk, but it is difficult to identify the point.

I want to ask one more question.
Can I put a new camshaft in 1988-2000 the old cylinder head 1985-1988?
Just coincidence sites for bearings and cam position. (I know about the thin chain sprockets and other
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Old 10-25-2012, 12:31 PM   #6084
elsalvadorklr
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Quote:
Originally Posted by MentalGuru View Post
The next post says the "Different combustion chamber due to 97-100mm bore"

Why should I see that...

So you edited the post after I after I started to quote your response... Got me....


BTW, if your only 99.9% sure. You don't know then....

what you takin about willis?

I meant my post...it was at the last part of the post...the smog part at least

geeze man, cant catch a break here

in any case they are interchangeable IF you use the same bore on an xr and plug up the holes

but this has nothing to do with what they were asking about which was about xr600 heads and they are all the same except for the dual carb heads

despite some people saying that 88-90 heads have some weird mojo going on because of the twin pipes and different carb settings, however I have not been able to confirm this

cheers

ps hey will you happen to have those headers by christmas still? that and the cooler will be my last mods I think for a long while!
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Old 10-25-2012, 12:33 PM   #6085
elsalvadorklr
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Quote:
Originally Posted by Ivanych View Post
Thank you very much!
I know it was a lot of talk, but it is difficult to identify the point.

I want to ask one more question.
Can I put a new camshaft in 1988-2000 the old cylinder head 1985-1988?
Just coincidence sites for bearings and cam position. (I know about the thin chain sprockets and other
Im not sure about this but I beleive NO...camshafts have a different center cam journal,again because if the dual carb head and yes sprockets are different

ask steve?

also any xrl camshaft will work, they are the same too for xr650l and xr600 88 and up
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Old 10-25-2012, 12:48 PM   #6086
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Quote:
Originally Posted by elsalvadorklr View Post
what you takin about willis?

I meant my post...it was at the last part of the post...the smog part at least

geeze man, cant catch a break here

in any case they are interchangeable IF you use the same bore on an xr and plug up the holes


cheers

ps hey will you happen to have those headers by christmas still? that and the cooler will be my last mods I think for a long while!

What? No sense of humor???

Yes, I'll have the header for you. It will be down there before Santa takes off...


My choice would be the XR600R head for XR650L's also for the add squish... Just sayin...

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Old 10-25-2012, 12:57 PM   #6087
elsalvadorklr
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I might be losing my sarcastic edge...sorry! jajaja

true again...you guys know much more....

what true is ive learned a few things like the longer piston pin and longer skirt the 87 and down pistons have compared to other years

now that I think about it, I wonder if the compression is slightly higher(or if the piston sits higher) on older pistons compared to other years too...being that the head is different on dual head engines and the actual piston design

I havent heard of anybody else using this piston oem combo on younger year bikes

steve and I bought this out of mistake on ebay..only to find out that the stock piston pin I had was too short! then we had to buy a new oem 87 piston pin! jajajaq

there is a big difference in the pistons 87 and 88 oem...

just interesting stuff to me

probably boring to others! jajajaja

thanks for holding onto the headers, I really think it will be a nice match for the mikuni and now the hrc cam..should be good no?
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Old 10-25-2012, 01:46 PM   #6088
nikolic
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Just a tought, if the xl600r has the 100mm piston, and the NX650 too, where's the 50ccm gone? Also,
some time ago, we've ordered a NX piston for a XL... didn't fit! I'm about to take my XR600R apart to see
why its eating so much oil and want to prepare miselfe. I have a 650 cilinder on but dont know which piston!
If needed I would go for wiseco but it's too much money to be wasted if I take the wrong one....
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Old 10-25-2012, 02:08 PM   #6089
MentalGuru
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Quote:
Originally Posted by elsalvadorklr View Post
I might be losing my sarcastic edge...sorry! jajaja

true again...you guys know much more....

what true is ive learned a few things like the longer piston pin and longer skirt the 87 and down pistons have compared to other years

now that I think about it, I wonder if the compression is slightly higher(or if the piston sits higher) on older pistons compared to other years too...being that the head is different on dual head engines and the actual piston design

I havent heard of anybody else using this piston oem combo on younger year bikes

steve and I bought this out of mistake on ebay..only to find out that the stock piston pin I had was too short! then we had to buy a new oem 87 piston pin! jajajaq

there is a big difference in the pistons 87 and 88 oem...

just interesting stuff to me

probably boring to others! jajajaja

thanks for holding onto the headers, I really think it will be a nice match for the mikuni and now the hrc cam..should be good no?

Losing your edge at times?

I laughed when I saw your edited post after I had quoted your original post. You just needed a a few seconds to complete your thoughts...

I'm always editing posts for the same reason(or to make them readable...) I have had the same thing happen to me. Ya gotta be quick around here.

I type with 1.5 fingers so it takes me along time to type. Preview post is your friend. Check it right before you post to see if there are any new posts made first. It works good for me, my thought are normally completed by then most of the time.

The header should work nicely with your set-up, its what CW said to use given the choice. It will help keep your engine cooler since the primarys are double wall. It will also works great with header wrap since the double wall primarys keep cracks from happening. It should add some top end and help keep the beast cool.

So the piston was lighter, but was the '87 pin heavier???


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Old 10-25-2012, 02:20 PM   #6090
MentalGuru
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Quote:
Originally Posted by nikolic View Post
Just a tought, if the xl600r has the 100mm piston, and the NX650 too, where's the 50ccm gone? Also,
some time ago, we've ordered a NX piston for a XL... didn't fit! I'm about to take my XR600R apart to see
why its eating so much oil and want to prepare miselfe. I have a 650 cilinder on but dont know which piston!
If needed I would go for wiseco but it's too much money to be wasted if I take the wrong one....

The XL600R engine(589cc) has a 75mm stroke, other XL600RM's(non US) and such can have elec start with 80mm stroke cranks w/ 97mm bore 591cc combo also. The XR650L (644cc) has a 82mm stroke crank which adds the 55cc if IRC. A XR600R (591cc) has a 80mm stroke crank.


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