Bore stock cylinder to 48mm??

Does your Spree/Elite already run great, and you're trying to make it quicker/faster? Need a monster motor swap? Discuss your ideas here.

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AveCat
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Bore stock cylinder to 48mm??

Post by AveCat »

Searched and couldn't find anything...


Is it possible to bore the stock cylinder from 41mm to 48mm? I know Taz sells a kit, but can I just buy the piston and then have it bored?
1987 Honda Spree - Black - Purchased 3/9/2015
48mm Big Bore Kit
Complete engine rebuild - All new seals, bearings, piston, cylinder, and gaskets
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cruzingratiot
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Re: Bore stock cylinder to 48mm??

Post by cruzingratiot »

if you can bore the stock cylinder ?
take into consideration price of everything

Piston$$
cylinder boring & honning $$
Gaskets $$
your time finding someone to do the work
dropping it off picking it up and than waiting for it to be done and gas $$

or buy it shipped to your door and done $$
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AveCat
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Re: Bore stock cylinder to 48mm??

Post by AveCat »

Just ordered the kit

Thanks for the advice!
1987 Honda Spree - Black - Purchased 3/9/2015
48mm Big Bore Kit
Complete engine rebuild - All new seals, bearings, piston, cylinder, and gaskets
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paulpauly7
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Re: Bore stock cylinder to 48mm??

Post by paulpauly7 »

"dude swap in a dio"
86 Nifty Fifty (spree)
ZX disk brake
Kitico 120kmh speedo
AF18 ZX ported
Polini corsa
Malossi crank
CTmani
24mmOKO
40pilot118main
Scorpion pipe
8.44 to 1
Michelin s1
71.3mph
92 yz125, 94 crm250
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DirtyE
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Re: Bore stock cylinder to 48mm??

Post by DirtyE »

I would not suggest boring a 41mm cylinder to 48mm. the ports would surely change timing drastically as the farther out you go, the port ceilings drop.
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patthesoundguy
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Re: Bore stock cylinder to 48mm??

Post by patthesoundguy »

We have seen what happens when you bore a stock spree bore out to 48mm. It wasn't pretty ;-)
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84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
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85 Aero 80 stock
84 elite 125 stock
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patthesoundguy
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Re: Bore stock cylinder to 48mm??

Post by patthesoundguy »

I really liked my big bore setup on my spree. It was pretty fun and if you want more guts on the cheap its a good way to get it. Its way cheaper to get the whole kit. http://m.ebay.com/itm/371080961158?nav=SEARCH
Dude! Ya Can't Fix Stupid!
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
AveCat
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Re: Bore stock cylinder to 48mm??

Post by AveCat »

patthesoundguy wrote:I really liked my big bore setup on my spree. It was pretty fun and if you want more guts on the cheap its a good way to get it. Its way cheaper to get the whole kit. http://m.ebay.com/itm/371080961158?nav=SEARCH

That's the kit I bought :D

Just waiting to put it on now
1987 Honda Spree - Black - Purchased 3/9/2015
48mm Big Bore Kit
Complete engine rebuild - All new seals, bearings, piston, cylinder, and gaskets
kirt70camaro
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Re: Bore stock cylinder to 48mm??

Post by kirt70camaro »

Keep us posted how well it works. A lot of people say it will seize up because the quality is poor. So give us updates every so often please.
AveCat
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Re: Bore stock cylinder to 48mm??

Post by AveCat »

kirt70camaro wrote:Keep us posted how well it works. A lot of people say it will seize up because the quality is poor. So give us updates every so often please.
Well that's not what I want to hear....
It appears to be good quality so it should be interesting.

I'm gonna create a build thread so keep an eye there.
1987 Honda Spree - Black - Purchased 3/9/2015
48mm Big Bore Kit
Complete engine rebuild - All new seals, bearings, piston, cylinder, and gaskets
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paulpauly7
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Re: Bore stock cylinder to 48mm??

Post by paulpauly7 »

make sure you chamfer the ports befor install .
86 Nifty Fifty (spree)
ZX disk brake
Kitico 120kmh speedo
AF18 ZX ported
Polini corsa
Malossi crank
CTmani
24mmOKO
40pilot118main
Scorpion pipe
8.44 to 1
Michelin s1
71.3mph
92 yz125, 94 crm250
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patthesoundguy
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Re: Bore stock cylinder to 48mm??

Post by patthesoundguy »

paulpauly7 wrote:make sure you chamfer the ports befor install .
Great tip pauly! I always do that to my new cylinders. Even if the whole thing is supposed to be bolt and go, it likely needs the proper port chamfers done before you install. It sure helps the durability. Many of the big bore spree kits have been very durable. The cylinder kits from Taz is real and not junk, as long as you follow proper break-in procedure everything should be great.
Dude! Ya Can't Fix Stupid!
84 Spree stock
84 Spree Dio AF18E MHR Cylinder Arrow Pipe 28mm OKO
80 Express, 47mm DR BBKit, Weak Ends Intake, Boyesen Dual stage reeds, 19mm Delorto carb, MLM pipe
79 Express
85 Aero 80 stock
84 elite 125 stock
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Re: Bore stock cylinder to 48mm??

Post by AveCat »

Glad to hear it!
1987 Honda Spree - Black - Purchased 3/9/2015
48mm Big Bore Kit
Complete engine rebuild - All new seals, bearings, piston, cylinder, and gaskets
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