[jospeed]

Does anyone know what size a 138+r and 55mm stroker crank comes out to in cc?

 

[uno4cinco]

a 9 million



















155?

 

[slapaho16]

No Smaller Than A 155 A 143 W 55mm Stroker Is A 155

 

[w650gb500]

150cc

I just did the same thing. It ends up being a 150.

 

[WICKED 50]

here you go that motor is only 145.1ccs



Take the bore x bore x .7854 x the stroke and you will get cubic inches which comes out to be 8.86ci. Now take the ci 8.86 and times it by 16.386 and you will get ccs 145.1 not 150ccs

 

[KLX110rr]

It's a 150cc.



Bookmark this:



Interactive Engine Displacement Calculator



handy little web page.

 

[WICKED 50]

You should check your calculator







Input Parameters Are the Following:

Number of Cylinders are = 1 to 1

Piston Diameter = 2.283 Inches

Piston Oversize = 0.000 Inches

Engine Stroke = 2.165 Inches

Computation Results:

Computed Engine Displacement (CID) is 9

Computed Engine Displacement (Litres) is 0.1

Computed Engine Displacement (CC) is 145.2



Still not 150ccs

 

[KLX110rr]

Input Parameters Are the Following:

Number of Cylinders are = 1 to 1

Piston Diameter = 59.000 Millimeters

Piston Oversize = 0.000 Millimeters

Engine Stroke = 55.000 Millimeters

Computation Results:

Computed Engine Displacement (CID) is 9

Computed Engine Displacement (Litres) is 0.2

Computed Engine Displacement (CC) is 150.4



maybe we should check piston sizes.



138cc kit = 59mm piston (correct?)

134cc kit = 58mm piston

 

[WICKED 50]

I will agree with that its 59mm not 58mm

 

[jospeed]

Wow you guys seem to know your stuff about this. I just put it together and haul A$$. It looks like its only a 150cc. So how can I get more juice out of this motor? Thanks guys.

 

[fastdwarf28]

you can put a 180 kit in it that will give you much more.

 

[w650gb500]

59mm bore and 55mm stroke



59 x 59 = 3481



3481 x .7854 = 2733.977



2733.977 x 55 = 150.368735cc



150cc

 

[jones]

put on a mikuni 28mm flat side carb with a 27.5 pilot and 220 main the clip in the middle the you will really like it

 

[jospeed]

who sells 180 kits?

 

[Paxracing]

59x59x55x.7854x1= 150.368 Cc



Bore X Bore X Stroke X .7854 X 1 = 150.368

 

[yamaharider324]

who sells 180 kits?

i think moto hp does. not sure though.

 

[aedwards07]

Yep. motohp.net sells them.

 

[zoomer46]

anyone know bout how well the 180 kit works?



never seen anything about it..