Planet Minis

hobo12 · 09-05-2008, 11:04 PM

My son has a 03 xr70 that i just put the 88cc bore kit on. It is running a 13 tooth front sproket right now.. Manual clutch, did the airbox mod, has good muff on it, advanced the timing.. The 88 kit helped alot with torque , not much with speed. what I was wanting to know is what gearing most people are running with this type of setup? I have redone the suspension and all because he is really wanting to ride hard and start riding some tracks.

Thanks Mike

hobo12 · 09-06-2008, 08:34 AM

What no opinions of what works best

SUZUKIRM12594 · 09-06-2008, 08:38 AM

Maybe a 15-16 front

hobo12 · 09-06-2008, 08:52 AM

oh ya it has a stock rear sprocket on it now.. I am not sure how many tooth that is??

SUZUKIRM12594 · 09-06-2008, 08:54 AM

ya I woulda told you the rear but I didnt know what you had on right now...You ming running a quick count?

hobo12 · 09-06-2008, 09:17 AM

I am counting 36 teeth on the rear

SUZUKIRM12594 · 09-06-2008, 09:59 AM

Quote:

Originally Posted by hobo12

I am counting 36 teeth on the rear

32 should do

hobo12 · 09-06-2008, 10:11 AM

cool thanks

GAjonn · 09-06-2008, 02:52 PM

Hobo
I tried a 13 on the front of my sons 2001 XR70 and he didnt like it much. When i tried it my self i saw that it really makes the bike a 2 speed transmission. It makes first gear so low as to be unusable. With an 88 kit i would think that extra torque would alow it to pull the taller gearing much better and still leave you the flexibility of all your gears.

hobo12 · 09-06-2008, 10:03 PM

I have a 15 tooth I can put on the front but should I increase the rear any?

hobo12 · 09-06-2008, 10:26 PM

anyone,, I know their is someone running a 88cc with stock head that could help answer this question.

hobo12 · 09-07-2008, 01:18 AM

Come on guys I am really needing some suggestions to get my kids 70 some more umph on the mx track

Thanks

hobo12 · 09-07-2008, 09:16 AM

bump

GAjonn · 09-07-2008, 03:34 PM

Hobo
What size track is he running on? Is it a back yard size track or a larger size track? Super cross style or out door style. Is he getting pretty deep into 3rd gear or not? If he is not getting deep into 3rd gear then yes, you could drop a tooth on the counter shaft sprocket. if its a ssupercross style track then you could prolly go more to get better grint out of the turns and over the jumps.
You said your gears as they are set up now is not helping much with speed. Are you looking for more top end? or more acceleration? does the motor sound topped out at the end of the straightaways?
One track my son races on has a bunch of short straights but one really long straight so we are running a 15 tooth counter sprocket right now to let him get all of 3rd gear down that long straightaway. I know some others are running steeper gearing and running out of top speed on the long straight but getting much better pull out of alot of the other corners and short straights on the track.
there is no one pat answer but i hope this helps.
John

09-05-2008, 11:04 PM	#1 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Best gear setup My son has a 03 xr70 that i just put the 88cc bore kit on. It is running a 13 tooth front sproket right now.. Manual clutch, did the airbox mod, has good muff on it, advanced the timing.. The 88 kit helped alot with torque , not much with speed. what I was wanting to know is what gearing most people are running with this type of setup? I have redone the suspension and all because he is really wanting to ride hard and start riding some tracks. Thanks Mike

09-06-2008, 08:34 AM	#2 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup What no opinions of what works best

09-06-2008, 08:38 AM	#3 (permalink)
SUZUKIRM12594 3rd Gear Member Join Date: Jun 2008 Location: Glendale California Posts: 4,679 My Mood:	Re: Best gear setup Maybe a 15-16 front

09-06-2008, 08:52 AM	#4 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup oh ya it has a stock rear sprocket on it now.. I am not sure how many tooth that is??

09-06-2008, 08:54 AM	#5 (permalink)
SUZUKIRM12594 3rd Gear Member Join Date: Jun 2008 Location: Glendale California Posts: 4,679 My Mood:	Re: Best gear setup ya I woulda told you the rear but I didnt know what you had on right now...You ming running a quick count?

09-06-2008, 09:17 AM	#6 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup I am counting 36 teeth on the rear

09-06-2008, 10:11 AM	#8 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup cool thanks

09-06-2008, 02:52 PM	#9 (permalink)
GAjonn 2nd Gear Member Join Date: May 2008 Location: Dacula GA Posts: 297 My Mood:	Re: Best gear setup Hobo I tried a 13 on the front of my sons 2001 XR70 and he didnt like it much. When i tried it my self i saw that it really makes the bike a 2 speed transmission. It makes first gear so low as to be unusable. With an 88 kit i would think that extra torque would alow it to pull the taller gearing much better and still leave you the flexibility of all your gears.

09-06-2008, 10:03 PM	#10 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup I have a 15 tooth I can put on the front but should I increase the rear any?

09-06-2008, 10:26 PM	#11 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup anyone,, I know their is someone running a 88cc with stock head that could help answer this question.

09-07-2008, 01:18 AM	#12 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup Come on guys I am really needing some suggestions to get my kids 70 some more umph on the mx track Thanks

09-07-2008, 09:16 AM	#13 (permalink)
hobo12 PM Newbie Join Date: Aug 2008 Location: springdale arkansas Posts: 44	Re: Best gear setup bump

09-07-2008, 03:34 PM	#14 (permalink)
GAjonn 2nd Gear Member Join Date: May 2008 Location: Dacula GA Posts: 297 My Mood:	Re: Best gear setup Hobo What size track is he running on? Is it a back yard size track or a larger size track? Super cross style or out door style. Is he getting pretty deep into 3rd gear or not? If he is not getting deep into 3rd gear then yes, you could drop a tooth on the counter shaft sprocket. if its a ssupercross style track then you could prolly go more to get better grint out of the turns and over the jumps. You said your gears as they are set up now is not helping much with speed. Are you looking for more top end? or more acceleration? does the motor sound topped out at the end of the straightaways? One track my son races on has a bunch of short straights but one really long straight so we are running a 15 tooth counter sprocket right now to let him get all of 3rd gear down that long straightaway. I know some others are running steeper gearing and running out of top speed on the long straight but getting much better pull out of alot of the other corners and short straights on the track. there is no one pat answer but i hope this helps. John

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