Stroking?

150rguy

I got fat bars!

Member

Dec 21, 2006

654

0

• Sep 5, 2007

• #1

My dad and I are thinking of having my 85 mod stroked.
Those of you that had this done, who did you have it done by? who are the best people to have it stroked by? And do you think it was worth it?

Thanks

 

H

hot125mod

Member

Jan 14, 2007

501

0

• Sep 6, 2007

• #2

crank works in arizona is the place to have it done, what brand of 85?

 

Patman

Pantless Wonder

LIFETIME SPONSOR

Dec 26, 1999

19,765

1

• Sep 6, 2007

• #3

He posted "Honda" but I wacked the post accidentally. Damn the notebook touchpad.

 

S

snb73

Member

Nov 30, 2003

770

0

• Sep 7, 2007

• #4

http://www.forwardmotion.com.mx/supermini144BigBore125Kits.html

 

D

dirtbike_freak

Member

Dec 10, 2006

211

0

• Sep 7, 2007

• #5

snb73 said:

http://www.forwardmotion.com.mx/supermini144BigBore125Kits.html

Click to expand...

He's racing it in 85 12-13, not sprmini or 125, so he cant have it bored/

 

whenfoxforks-ruled

Old MX Racer

~SPONSOR~

Oct 19, 2006

8,129

2

Merrillville,Indiana

• Sep 8, 2007

• #6

Who is going to protest? What is the biggest bore you can put,legally? Where does these different rod lengths coming from,track talk?

 

D

dpaxson

Member

Sep 30, 2006

54

0

• Sep 8, 2007

• #7

I might be making a complete fool of myself right here but how can you race a stroked 85 in the 85 class. Any increase in stroke is going to increase the displacement right? or is there some weird regulation that allows this?

 

whenfoxforks-ruled

Old MX Racer

~SPONSOR~

Oct 19, 2006

8,129

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Merrillville,Indiana

• Sep 8, 2007

• #8

super mini,12 to 15 year old,80 to 112 cc.

 

D

dpaxson

Member

Sep 30, 2006

54

0

• Sep 8, 2007

• #9

he said he's not racing it in supermini

 

whenfoxforks-ruled

Old MX Racer

~SPONSOR~

Oct 19, 2006

8,129

2

Merrillville,Indiana

• Sep 8, 2007

• #10

That is funny! I am assumed that he was going to race it,the thread got jacked into he was racing it! I am sure that he can race in any class he wants at the track he goes to,I forgot he stated in a thread before about illegally racing.

 

Jasle

Sponsoring Member

Nov 27, 2001

1,358

1

• Sep 9, 2007

• #11

dpaxson said:

I might be making a complete fool of myself right here but how can you race a stroked 85 in the 85 class. Any increase in stroke is going to increase the displacement right? or is there some weird regulation that allows this?

Click to expand...

Stroke it/ put an 80 cylinder on it or sleeve it down. Its done on the RM's occasionally to keep it 85cc but have a different bore/stroke. Have not heard of anyone doing it on a Honda but i don't know everything.

 

whenfoxforks-ruled

Old MX Racer

~SPONSOR~

Oct 19, 2006

8,129

2

Merrillville,Indiana

• Sep 9, 2007

• #12

Jasle said:

Stroke it/ put an 80 cylinder on it or sleeve it down. Its done on the RM's occasionally to keep it 85cc but have a different bore/stroke. Have not heard of anyone doing it on a Honda but i don't know everything.

Click to expand...

This is the part I do not get. In most motor sport applications a longer stroke relates to more bottom and less top end. The norm,I thought was short stroke and revs to the moon. Now if you can have both! The super mini,legally can go to 105,that may change. If I wanted to detune a 2 stroke it would be a longer rod and less compression. Bore and stroke being square is not some mothers day miracle,it happens for a reason!

 

D

dirtbike_freak

Member

Dec 10, 2006

211

0

• Sep 9, 2007

• #13

If he cant race it in 85 12-13, then I dont think he would have it done.

 

Jasle

Sponsoring Member

Nov 27, 2001

1,358

1

• Sep 13, 2007

• #14

we run supermini's up to 112. not sure why but I'm pretty sure its dean at R&D doing most of the longer stroke/smaller bore stuff. he does some pretty fast motors. Tomac rides his stuff.