what piston should I get? (Spree)

B-Nasty · Post by **B-Nasty** » Thu Sep 15, 2011 11:59 pm

I just bought an 87 spree today. Its complete but wouldnt run. I tested the compression, only 70psi. I took the head, cyl/jug, and piston off. There is some pretty heavy scoring on the cylinder/jug wall and piston. The jug needs to be bored and piston replaced. So my questions are:
1. What should it cost to get my jug bored/re-sleeved (if its not scored too deep).
2. If it is scored too deep is there anywhere I can get a jug ready to go?
3. Where should I get the piston? Ive seen some on ebay- 41, 44, and 48mm piston kits by RIK? are these any good?
-I know I will have to wait to hear about my jug before I know what size piston to get.
4. Should I do anything about any metal shavings that may have fallen off the piston and/or jug into the crankcase? Change the oil?
5. Can I reuse the metal gasket between the head and jug?
6. There was no gasket between the jug and crankcase...what kind of gasket is supposed to be there?

Thanks guys. I am looking forward to getting this thing on the road!

niftyman · Post by **niftyman** » Fri Sep 16, 2011 2:53 am

Buy the 48mm big bore kit , intake kit , and the gear set you may as well up grade it a bit if your gonna fit a new piston the kit is complete bolt on no need to get your cylnder bored out just throw it in the bin

niftyman · Post by **niftyman** » Fri Sep 16, 2011 2:55 am

Oh yeah the seller is tazland001 here or chopchop123 on ebay

B-Nasty · Post by **B-Nasty** » Fri Sep 16, 2011 9:26 am

how much does all that cost? I am trying to keep this project low cost. Do I need the intake kit and gear set or can I just get the big bore kit? I am not really concerned about performance.

Mystic · Post by **Mystic** » Fri Sep 16, 2011 9:33 am

no you dont necessarily need anything but the bore kit but to take advantage of hte extra power it produces you need the intake and gears but not necessary. chopchop123 on ebay has the 44mm kit for around 100

just checked he only has the 48mm and the 41mm (stock) right now. if your cylinder isnt in bad shape you could just have it honed and get the 41mm piston kit he has on there for 45 dollars

B-Nasty · Post by **B-Nasty** » Fri Sep 16, 2011 9:40 am

cool I just looked the kit up on ebay and sent him a msg. Hopefully he has a 44mm kit....

Mystic · Post by **Mystic** » Fri Sep 16, 2011 9:50 am

if you do increase the bore size you may want to at least put a different main jet in there, more displacement means it needs a little extra fuel and maybe an oz of oil in the gas tank since hte stock oil pump wasnt made to support a larger bore just to be on the safe side

since more oil you will need a slightly bigger main as well. there are a few mods you can do to improve the fuel delivery like enlarging the intake ports on the crankcase. nothing you can really do about the exhaust though unless you are handy with a cutting torch and welding etc

good luck

B-Nasty · Post by **B-Nasty** » Fri Sep 16, 2011 1:36 pm

I just ordered the last 44mm kit. I am going to look into the other parts as well.
thanks for all the info!

B-Nasty · Post by **B-Nasty** » Fri Sep 16, 2011 1:41 pm

oh, the only thing I am unsure of now is what do I need to do about the crankcase if any metal shavings fell in there off the piston and jug?

niftyman · Post by **niftyman** » Fri Sep 16, 2011 5:08 pm

Or just buy the 44mm kit it comes with a new jet and instructions on how to fit it and run it in

You probably will want to split the cases and clean it all out tazland also has gasket kits for when you put it back together

niftyman · Post by **niftyman** » Fri Sep 16, 2011 8:11 pm

Calm down we dont need this sh it on another thread

Just buy the 44 split the cases clean it out and bobs your uncle

B-Nasty · Post by **B-Nasty** » Sat Sep 17, 2011 10:20 am

niftyman wrote:Calm down we dont need this sh it on another thread

Just buy the 44 split the cases clean it out and bobs your uncle

What does splitting the case entail? will I need a new gasket?

breaze · Post by **breaze** » Sat Sep 17, 2011 11:19 am

Hm-m-m, I am no expert, but splitting the case seems a bit drastic to clean it out unless you plan to put in new bearings/seals anyway. Seems like I read about mixing up a few solvents and rinsing it out...

You can do some searches on here for splitting the case - quite a bit of work and special tools certainly are helpful.

I guess if you want to be sure and you're investing in a new top-end, it would be good to know for certain that the crank-case is clean.

B-Nasty · Post by **B-Nasty** » Sat Sep 17, 2011 11:55 am

I think I am just going to change the oil. There are no chunks of the piston/rings/cyl missing (just heavy scoring) so I doubt there is anything in the bottom end that could cause damage quickly.

PimpinSpree · Post by **PimpinSpree** » Sat Sep 17, 2011 12:14 pm

Bear45-70 wrote:
Mystic wrote:no you dont necessarily need anything but the bore kit but to take advantage of hte extra power it produces you need the intake and gears but not necessary. chopchop123 on ebay has the 44mm kit for around 100

just checked he only has the 48mm and the 41mm (stock) right now. if your cylinder isnt in bad shape you could just have it honed and get the 41mm piston kit he has on there for 45 dollars
Mystic (it is a mystery how you can give advice), how the * can you tell him to just hone the cylinder when you have no idea of how bad the cylinder is? It may very well need a bore job. You know nothing experts need to shut the * up about things you know nothing about.

B, if the cylinder wall have scratches that you can catch your finger nail in, it needs to be bored.

Bear, the advice wasn't bad advice. He said if the condition isn't too bad...... He wasn't as specific as you think he should have been. That doesn't mean you should chew him out. Just add the information you thought needed to he added. No reason to start a fight over nothing.

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what piston should I get? (Spree)

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