Planet Minis

JJW Designs · 03-31-2008, 04:41 PM

Alright, I'm building a "monster" XR100/ CR85 bike. I bored it to a 120, have a fresh tranmission it it, working on the exhaust, working on oversized valves, but now am running into a problem. I need a crank.

I need a GOOD crank, no oem. From what I've been told the oem one won't last well once the engine is finished (due to the larger displacement and extra power). I checked hotrods and BBR, no luck. Powroll doesn't seem to have them and I am not buying oem. Does anyone know where to get a good crank/rod for a XR80/100???

JJW Designs · 03-31-2008, 05:19 PM

Man... BBR, Motosport, Powroll, local dealers... still no luck.

xr70racer · 03-31-2008, 05:23 PM

I'm running the BBR kit and cam in my motor...

firepower354 · 03-31-2008, 08:24 PM

Tak, Kitaco, ShiftUp are about it. The stocker is fine in my 120 though. I lightened it over a pound, to less than the 80 crank. Unless you have a good head, it won't rev high enough or make enough power to hurt itself. Powroll is a rebuilt stocker with added stroke.

JJW Designs · 04-01-2008, 11:51 AM

Quote:

Originally Posted by firepower354

Tak, Kitaco, ShiftUp are about it. The stocker is fine in my 120 though. I lightened it over a pound, to less than the 80 crank. Unless you have a good head, it won't rev high enough or make enough power to hurt itself. Powroll is a rebuilt stocker with added stroke.

Completely re-designed head with oversized valves. This thing is going to fry a stock crank.

BlackBeard · 04-01-2008, 12:35 PM

stock will be fine. 120 no matter how crazy wont put out the numbers to fry that crank. my 120 (head,cam, blah) has been perfect with over 15,000 street and dirt miles. ridden by mike healy at langstown and all sorts of semi pro's. i think its safe to say use stock!

JJW Designs · 04-01-2008, 12:43 PM

Alright... looks like I have to try stock but I still think there has to be a better crank out there. The stock one is flimsy and I'm told I'll have to get one once a year.

Oh well, cases only last a couple years anyways... :P

BlackBeard · 04-01-2008, 01:00 PM

i think differently. my motor is still running and it has been in a cr80 conversion its whole life that is also titled. like i said if my built 120 has lasted 15,000 miles on the stock cases,crank, oil pump you wont have to worry. like firepower said if you want better just cut it down.

fat50racer · 04-01-2008, 01:06 PM

My Xr Had The 120,cam,carb Etc And Stock Crank Ran Great From Track Riding To Desert Riding. Good Luck!

JJW Designs · 04-01-2008, 01:11 PM

Well that's re-assuring. Maybe my parts will last longer than I thought. I guess only way to find out for sure!

fat50racer · 04-01-2008, 01:13 PM

yep. post up some pics. I loved the xr/cr85 conversion we had. too bad my kids grades tanked or we'd still be playing on that one.

slide1in · 04-01-2008, 01:23 PM

You Can't Go Wrong With A Oe Honda Crank

firepower354 · 04-01-2008, 06:34 PM

The stock 100 has a 26mm pin and a pretty beefy rod. Unless the stamped sling gets full of crap, it should last forever.

How'd you find room for much more than 1-1.5mm larger valves? They're pretty close together.

03-31-2008, 04:41 PM	#1 (permalink)
JJW Designs Advertiser Join Date: Feb 2006 Location: La Center, WA Posts: 2,398	Need a crank for a XR100 Alright, I'm building a "monster" XR100/ CR85 bike. I bored it to a 120, have a fresh tranmission it it, working on the exhaust, working on oversized valves, but now am running into a problem. I need a crank. I need a GOOD crank, no oem. From what I've been told the oem one won't last well once the engine is finished (due to the larger displacement and extra power). I checked hotrods and BBR, no luck. Powroll doesn't seem to have them and I am not buying oem. Does anyone know where to get a good crank/rod for a XR80/100??? __________________ Graphic designer by trade, rider by heart.

03-31-2008, 05:19 PM	#2 (permalink)
JJW Designs Advertiser Join Date: Feb 2006 Location: La Center, WA Posts: 2,398	Re: Need a crank for a XR100 Man... BBR, Motosport, Powroll, local dealers... still no luck. __________________ Graphic designer by trade, rider by heart.

03-31-2008, 05:23 PM	#3 (permalink)
xr70racer 3rd Gear Member Join Date: Feb 2006 Location: Glen Mills, PA Posts: 4,384	Re: Need a crank for a XR100 I'm running the BBR kit and cam in my motor...

03-31-2008, 08:24 PM	#4 (permalink)
firepower354 3rd Gear Member Join Date: Oct 2006 Location: Flint MI Posts: 6,255	Re: Need a crank for a XR100 Tak, Kitaco, ShiftUp are about it. The stocker is fine in my 120 though. I lightened it over a pound, to less than the 80 crank. Unless you have a good head, it won't rev high enough or make enough power to hurt itself. Powroll is a rebuilt stocker with added stroke.

04-01-2008, 12:35 PM	#6 (permalink)
BlackBeard "ZBBT" Join Date: Oct 2007 Location: 50 riders Posts: 1,772	Re: Need a crank for a XR100 stock will be fine. 120 no matter how crazy wont put out the numbers to fry that crank. my 120 (head,cam, blah) has been perfect with over 15,000 street and dirt miles. ridden by mike healy at langstown and all sorts of semi pro's. i think its safe to say use stock!

04-01-2008, 12:43 PM	#7 (permalink)
JJW Designs Advertiser Join Date: Feb 2006 Location: La Center, WA Posts: 2,398	Re: Need a crank for a XR100 Alright... looks like I have to try stock but I still think there has to be a better crank out there. The stock one is flimsy and I'm told I'll have to get one once a year. Oh well, cases only last a couple years anyways... :P __________________ Graphic designer by trade, rider by heart.

04-01-2008, 01:00 PM	#8 (permalink)
BlackBeard "ZBBT" Join Date: Oct 2007 Location: 50 riders Posts: 1,772	Re: Need a crank for a XR100 i think differently. my motor is still running and it has been in a cr80 conversion its whole life that is also titled. like i said if my built 120 has lasted 15,000 miles on the stock cases,crank, oil pump you wont have to worry. like firepower said if you want better just cut it down.

04-01-2008, 01:06 PM	#9 (permalink)
fat50racer 1st Gear Member Join Date: Dec 2003 Location: T.O. California Posts: 195	Re: Need a crank for a XR100 My Xr Had The 120,cam,carb Etc And Stock Crank Ran Great From Track Riding To Desert Riding. Good Luck!

04-01-2008, 01:11 PM	#10 (permalink)
JJW Designs Advertiser Join Date: Feb 2006 Location: La Center, WA Posts: 2,398	Re: Need a crank for a XR100 Well that's re-assuring. Maybe my parts will last longer than I thought. I guess only way to find out for sure! __________________ Graphic designer by trade, rider by heart.

04-01-2008, 01:13 PM	#11 (permalink)
fat50racer 1st Gear Member Join Date: Dec 2003 Location: T.O. California Posts: 195	Re: Need a crank for a XR100 yep. post up some pics. I loved the xr/cr85 conversion we had. too bad my kids grades tanked or we'd still be playing on that one.

04-01-2008, 01:23 PM	#12 (permalink)
slide1in 1st Gear Member Join Date: Sep 2007 Posts: 225	Re: Need a crank for a XR100 You Can't Go Wrong With A Oe Honda Crank

04-01-2008, 06:34 PM	#13 (permalink)
firepower354 3rd Gear Member Join Date: Oct 2006 Location: Flint MI Posts: 6,255	Re: Need a crank for a XR100 The stock 100 has a 26mm pin and a pretty beefy rod. Unless the stamped sling gets full of crap, it should last forever. How'd you find room for much more than 1-1.5mm larger valves? They're pretty close together.

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