OS Speed vs. The new Ninja JX21

Reply Subscribe

Thread Tools

Search this Thread

10-21-2008, 09:40 AM

#91

JayL

R/C Tech Elite Member

Join Date: Mar 2006

Location: Ca

Posts: 3,111

Trader Rating: 0

could you put the os speed crank in the jx21?

10-21-2008, 04:21 PM

#92

rallyebmx

Tech Elite

iTrader: (21)

Join Date: May 2007

Posts: 2,906

Trader Rating: 21 (100%+)

Quote:

Originally Posted by TonysScrews

Did you see the graph with the changed out head button?

WOW..WOW..WOW!

What head button was used???

10-21-2008, 04:54 PM

#93

jpalessi

Tech Elite

iTrader: (55)

Join Date: Feb 2008

Location: SoCal

Posts: 4,747

Trader Rating: 55 (100%+)

Quote:

Originally Posted by rallyebmx

What head button was used???

EB Mods

05-01-2009, 08:25 AM

#94

reggie l.

Tech Master

iTrader: (4)

Join Date: Jan 2009

Location: randallstown md.

Posts: 1,362

Trader Rating: 4 (100%+)

can a speed crank fit in this motor?

05-01-2009, 08:42 AM

#95

JAMMINKRAZY

Tech Champion

iTrader: (17)

Join Date: Jun 2007

Location: Pittsburgh PA

Posts: 6,575

Trader Rating: 17 (100%+)

Quote:

Originally Posted by reggie l.

can a speed crank fit in this motor?

yup.

05-01-2009, 08:54 AM

#96

reggie l.

Tech Master

iTrader: (4)

Join Date: Jan 2009

Location: randallstown md.

Posts: 1,362

Trader Rating: 4 (100%+)

ok never mind i just seen some piks of it..and from the piks im about 90% sure the speed crank will fit if so this will tame it some on the bottom for a smoother rpm range...and i have a speed crank in my vspec and thats wat it does to it...so when i get this motor that cranks going in here for testing

05-01-2009, 09:52 AM

#97

JayL

R/C Tech Elite Member

Join Date: Mar 2006

Location: Ca

Posts: 3,111

Trader Rating: 0

Quote:

Originally Posted by reggie l.

that would be a great plan especially since the jx has a better block. very interested in the results

05-01-2009, 11:08 AM

#98

rpm1968

Tech Master

iTrader: (18)

Join Date: Oct 2008

Location: Bend, OR

Posts: 1,449

Trader Rating: 18 (100%+)

Pretty sure you have to use the Speed Con Rod as well. Oiling holes are different or something.

05-01-2009, 11:29 AM

#99

JAMMINKRAZY

Tech Champion

iTrader: (17)

Join Date: Jun 2007

Location: Pittsburgh PA

Posts: 6,575

Trader Rating: 17 (100%+)

Quote:

Originally Posted by rpm1968

Pretty sure you have to use the Speed Con Rod as well. Oiling holes are different or something.

Not on the ninja. It uses the same rod as the speed. You can't use a speed crankshaft with a normal v-spec rod.

05-01-2009, 12:37 PM

#100

ezveedub

Tech Elite

iTrader: (17)

Join Date: Aug 2004

Location: Fort Lauderdale, FL

Posts: 2,426

Trader Rating: 17 (100%+)

There no issues with a Speed crank in a JX21. I currently have this setup. Same power just smoother delivery like the Speed. Currently, the Speed rods look just like the JX21. My last rod from Japan didn't have the high finish polish the first ones. Works fine though.

05-01-2009, 01:15 PM

#101

JAMMINKRAZY

Tech Champion

iTrader: (17)

Join Date: Jun 2007

Location: Pittsburgh PA

Posts: 6,575

Trader Rating: 17 (100%+)

Quote:

Originally Posted by ezveedub

Yeah I read somewhere that the only difference between the rods, is that the speed rods are polished.

05-01-2009, 05:03 PM

#102

reggie l.

Tech Master

iTrader: (4)

Join Date: Jan 2009

Location: randallstown md.

Posts: 1,362

Trader Rating: 4 (100%+)

Quote:

Originally Posted by ezveedub

awsome 2 hear..cant wait to do it

05-01-2009, 05:17 PM

#103

ezveedub

Tech Elite

iTrader: (17)

Join Date: Aug 2004

Location: Fort Lauderdale, FL

Posts: 2,426

Trader Rating: 17 (100%+)

Quote:

Originally Posted by JAMMINKRAZY

Yeah I read somewhere that the only difference between the rods, is that the speed rods are polished.

Actually, I left that info off my last post. My last Speed rod didn't have the polish finish. It pretty much was the same as the JX21 rod. The Speed rod I got a few weeks prior to that one was polished though. Most likely the ones still in stock in the US will be the polished ones.