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Post by ksaun123 on Jan 8, 2015 21:02:55 GMT -5
Ok I appreciate you taking your time to see, and for both opinions. Im going to go ahead and order the right, more expensive cylinder now.
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Post by ksaun123 on Jan 8, 2015 21:08:08 GMT -5
Ill just buy a new cylinder, and I just put a new set of rings on it 2 days ago. I believe if I hone the cylinder, it would not have any effect on the piston fitment.
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Post by geh3333 on Jan 8, 2015 21:18:32 GMT -5
Ill just buy a new cylinder, and I just put a new set of rings on it 2 days ago. I believe if I hone the cylinder, it would not have any effect on the piston fitment. If u would have used the old cylinder u would need to buy the appropriate piston and rings plus hone the cylinder. Just to let u know their is about a .5 mm difference between the top of the piston and the cylinder bore. The bottom of the piston is slightly larger then the top of the piston " slightly" It looks as if the top of your piston is about 1.5mm to 2mm smaller then the cylinder in the pic. |
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Post by ksaun123 on Jan 8, 2015 21:36:23 GMT -5
Whats the appropriate size piston? Its already set at 57.4mm. I don't own a small engine hone. The cylinder is new so why hone? What piston do you recommend? or what cylinder do you recommend? or combo
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Post by geh3333 on Jan 8, 2015 21:54:57 GMT -5
Whats the appropriate size piston? Its already set at 57.4mm. I don't own a small engine hone. The cylinder is new so why hone? What piston do you recommend? or what cylinder do you recommend? or combo Its good to buy a combo kit with both cylinder and piston together. If u use a cylinder that already had been used even slightly , the rings will create groves . even though the groves maybe very slight it could cause a problem with oil passing the rings . especially if the piston and the rings where loose , this means they never seated properly and I'm courious how the cylinder looks . if u buy a new cylinder u do not need to hone " of course" . u can inspect the used cylinder and if it doesn't look as if its damaged or if u cannot see any noticeable grooves u can take a chance with not honing but I wouldn't. I'd like to know the measurements of the cylinder and piston when u get a chance . |
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Post by geh3333 on Jan 8, 2015 22:03:01 GMT -5
Just for all to know I measured the stock piston at 57mm "top" the bottom is 57.5 and the inner cylinder is 58mm . so a 58.5 mm piston would be too big for the 58mm jug.
Maybe if you go crazy and hone the heck out of the cylinder u can get a 58.5 piston to fit .lol
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Post by ksaun123 on Jan 8, 2015 22:13:28 GMT -5
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Post by ksaun123 on Jan 8, 2015 22:17:46 GMT -5
I don't own a digital caliper right now.
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Post by geh3333 on Jan 8, 2015 22:21:57 GMT -5
That will work just fine. |
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Post by jerseyboy on Jan 8, 2015 22:27:19 GMT -5
I measured the combustion chamber on my stock head it is 57 dead nuts..too cold out to go get the jug and piston..lol
There you go ksaun123,,that looks like a nice stock set for $40 man,,cant go wrong,,just make sure to check ring end gap and all that happy stuff..I have all the info you will need on my BBK thread for measurements and ring clocking.
Torque head nuts in a crisscross pattern to 15-17ft lbs...and don't forget to install the 4 dowels..lol
And use assembly lube too..I just use STP oil treatment or some thick Rotella for that...don't want any dry starts...
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Post by jerseyboy on Jan 8, 2015 22:34:25 GMT -5
Have you actually checked the valves to see if they are seating well? Even with the gaps right if you have a valve blowing by you'll have no compression to speak of? Take the head and sit it down on a flat spot with the sparkplug in tightly and just pour the whole valve seat area with a thin oil or WD-40 and wait to see if the oil stays put or seeps out onto the surface below. If it does then you need to remove the valves and reseat them with valve grinding compound if the valves do not have a bad burned spot on them. I bought a brand new head once with badly seated valves. JR JR,,thats a great idea! Im going to do that with my new head just to make sure the valves are seating before I slap it together,,still waiting on a rocker assembly so I have time,,plus its 9 degrees outside,,next time the motor is coming out of the frame,,alot easier than dealing with those body panels  |
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Post by ksaun123 on Jan 8, 2015 22:34:55 GMT -5
Thanks for the help you all
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Post by rcq92130 on Jan 8, 2015 22:55:02 GMT -5
I have no idea what you are speaking about, J-Boy. It's a balmy 60 degrees out.
IMPORTANT ~~~ THERE ARE SIX, NOT FOUR LOCATING PINS !!!! TWO EACH BETWEEN: CRANKCASE & JUG; JUG & HEAD; HEAD & ROCKER ASSEMBLY.
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Post by ksaun123 on Jan 8, 2015 23:03:57 GMT -5
I knew what he meant. I tore down and built up the top end so many times its not funny.  |
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Post by scooter on Jan 9, 2015 0:11:45 GMT -5
I don't own a digital caliper right now. If you need one they go for about 5 dollars and up on ebay |
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