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cylinder specs

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so whats the deal with the rotary valve, are they needing service or if all seem good its fine?
 
All depends on how far you want to go. Unless the brass gear stripped you can roll the dice. I always do them but every time I have removed the bearings they've been mint.

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racerxxx said:
All depends on how far you want to go. Unless the brass gear stripped you can roll the dice. I always do them but every time I have removed the bearings they've been mint.

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Click to expand...

hmmm since no metal in motor and it looks and feels really good i think ill leave it be for now, maybe.
 
That is something that is determined at assembly time. You need to do a squish test, calculate the thickness and then you adjust the Skinner height by using a thicker out thinner gasket.

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what about rings there are two choises, depends on sleeve measurements or what? or use smaller rings 82mm with stock size pistons?
 
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racerxxx said:
That is something that is determined at assembly time. You need to do a squish test, calculate the thickness and then you adjust the Skinner height by using a thicker out thinner gasket.

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Click to expand...

that sounds complicated. is it?
 
NIL8er said:
what about rings there are two choises, depends on sleeve measurements or what? or use smaller rings 82mm with stock size pistons?
Click to expand...


You have to determine if you are boring out the cylinders, if so your new pistons will come with them. Depending on how big you go over you will then have to clearance your rave valves.


NIL8er said:
that sounds complicated. is it?
Click to expand...

It's very easy. The procedure is in the manual, the procedure takes a few minutes. But the short of it is you use a piece of solder and bring a cylinder just about up to TDC insert the solder parallel with the piston pin and "squish" the solder. Then remove the solder and measure it with a pair of verniers. The from that thickness you determine if you need a thicker or thinner gasket or is the one you have good. Typically you're damn close if you reuse the same size that came off. Between the cylinders there is a series of holes punched. The # of holes correlates with the thickness. I always torque the cylinders properly then check the squish and make my adjustments. You 100% without a doubt need to get a manual before you even turn one wrench on that engine. If not you're not going to have a good experience and it will put a bad taste in your mouth.
 
honed and measured $10, well within tolerances all the way around . Finally some good news. New rings gaskets cleaned Raves, and thats it. on that end
 
Ok, so then IF they are standard bore pistons you will need the standard rings. On top of the pistons (provided they are the origianl ones) they should be stamped ELKO and a number that is 81.89. If so you need the 82mm rings 290815080 and 290815100. You will need 2 of each they are sold individually. Again you must confirm what pistons are on there, you never know who was in there before you.


Here is a guy selling 2. He has make offer, hint hint.They're normally $23 each at teh dealer.

http://www.ebay.com/itm/Genuine-Sea...100-/161444602156?hash=item2596d9212c&vxp=mtr



Here is an OEM "equivalent", these are probably RIK rings. The OEM rings are usually $43 a pop at the dealer


http://www.ebay.com/itm/NEW-PISTON-...0CC-/301338025467?hash=item4629255dfb&vxp=mtr
 
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racerxxx said:
Ok, so then IF they are standard bore pistons you will need the standard rings. On top of the pistons (provided they are the origianl ones) they should be stamped ELKO and a number that is 81.89. If so you need the 82mm rings 290815080 and 290815100. You will need 2 of each they are sold individually. Again you must confirm what pistons are on there, you never know who was in there before you.


Here is a guy selling 2. He has make offer, hint hint.They're normally $23 each at teh dealer.

http://www.ebay.com/itm/Genuine-Sea...100-/161444602156?hash=item2596d9212c&vxp=mtr



Here is an OEM "equivalent", these are probably RIK rings. The OEM rings are usually $43 a pop at the dealer


http://www.ebay.com/itm/NEW-PISTON-...0CC-/301338025467?hash=item4629255dfb&vxp=mtr
Click to expand...

says elko 82-5 other side 021 is stamped, well raised
 
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Here is an OEM first over. A standard bore would be 81.89.


uploadfromtaptalk1433974657047.jpg

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I have several standard bore pistons and I have the new pair of OEM first overs. They all have the 82-5 inside them, but eh first overs have a + inside after the 82-5. So I would ASSUME that your's are standard and not over size. But before i would even attempt to ASSUME and order parts off an ASSUMPTION, I would clean the crown of the piston and get the actual numbers on there. use gas or lacquer thinner to dissolve the residue on the crown of the piston.
 
not 100% sure (im at work) but ive cleaned tops and dont recall any inscription there, but could be mistaken. ill double check in am. ill bet its there just didnt see it.
 
So then those links I posted would work since you have standard bores. Mine are easy to read because they're brand new still in the box.
 
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