IRK exploding clutches

1325 Views 23 Replies 13 Participants Last post by LongMooie, Jan 13, 2009

moto234

Discussion Starter · Jan 12, 2009

so has anybody actually had a manual clutch conversion explode from an IRK? i know it can happen and it has happend, but im wondering is it likely it will happen or is it just a chance

1 - 20 of 24 Posts

xr1million

· #2 · Jan 12, 2009

hahahaa ask Jetster! He about lost his foot! YES IT DOES HAPPEN!!!!!!!!!!!!!!!!!!!!!!!!!!!!

a mild mild case...

View attachment 46050

I thought I had a pic jetsters... but cant find 'er.

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LongMooie

· #3 · Jan 12, 2009

mine ran strong for over a year with 88cc takegawa clutch and then 124+R with takegawa special clutch.

i just put one in my new 50 and im gonna run a grim reaper auto clutch so i have faith in them, but i guess others are not so lucky

have there been reports of clutches going with stock ignition?

moto234

Discussion Starter · #4 · Jan 12, 2009

so its not really worth the risk ay? lol what about taking a little off the flywheel? like 5 ounces or something

50WHIP

· #5 · Jan 12, 2009

Yeah do the flywheel ,it's cheaper and safer.

RM898

· #6 · Jan 12, 2009

Any day now it will happen to me....I know it.

AHPminis

· #7 · Jan 12, 2009

moto234 said:
so its not really worth the risk ay? lol what about taking a little off the flywheel? like 5 ounces or something

I used to run the 107's without the billet basket (before it was even out) and IRK and had luck on my side I suppose, others were not so lucky. If you don't want it weighing on your mind just get the flywheel lightened, its the less extreme version

Kurlon

· #8 · Jan 12, 2009

I have yet to toss a clutch due to an IRK, and my auto 70 spun to 14k RPM.

I have exploded a cast manual clutch before, but that was on a 107 motor with a normal flywheel and e-start, so it actually had a heavier flywheel setup than a normal 50. It didn't see much for revs (built to be a torquer) but it did see a lot of clutch dumps, feathering, etc, and was trying to haul a 270lb guy around on pavement. I'm convinced it's more the rider than the flywheel that causes them to let go. If you're smooooth... they hold up, if you're a goober, it's a goner.

LongMooie

· #9 · Jan 12, 2009

intersting i weigh around 220lb and i reved the c**t outta my 88 and never had a problem, riding style it could be cos i never really featherd the clutch, i rode dirt if that makes any differance

~E

· #10 · Jan 12, 2009

LongMooie said:
mine ran strong for over a year with 88cc takegawa clutch and then 124+R with takegawa special clutch.

i just put one in my new 50 and im gonna run a grim reaper auto clutch so i have faith in them, but i guess others are not so lucky

have there been reports of clutches going with stock ignition?

The Grim Reaper is an awesome clutch, but your tranny might not hold up and careful of the full power 2nd gear shift... it can put you on your a$$.

~E

reserectedmxr

· #11 · Jan 12, 2009

I have had 2 irk motors: 88 rh with irk, no problems in 6month of beating the piss out of it. Kitaco 108 with kitaco irk, 1 month so far but I am looking for some reeg weights to simmer it down a little.

LongMooie

· #12 · Jan 12, 2009

~E said:
The Grim Reaper is an awesome clutch, but your tranny might not hold up and careful of the full power 2nd gear shift... it can put you on your a$$.

~E

LOL ok ill watch out for that,but im only on a fiddy at the moment!!! should i get a close ratio gear set i done that with my last bike and it made alot of differance. i thought the honda gears would hold up there not made of cheese like thumpstars

moto234

Discussion Starter · #13 · Jan 12, 2009

ill just lighten the flywheel a bit i think and call it good. i dont want t othink about the clutch exploding and shooting metal all up in my legs lol

fiveho

· #14 · Jan 12, 2009

i went with the Tak Special Clutch after this on my 119. this was a stock honda manual clutch

http://www.planetminis.com/f71/inner-rotor-stock-clutch-kaboom-pics-80913.html

~E

· #15 · Jan 12, 2009

LongMooie said:
LOL ok ill watch out for that,but im only on a fiddy at the moment!!! should i get a close ratio gear set i done that with my last bike and it made alot of differance. i thought the honda gears would hold up there not made of cheese like thumpstars

I never had a problem with my Reaper, but it is NOT a semi auto clutch like your stocker or the others you listed. It is a full-auto and does not 'engage' when holding the shift lever down (or up)... it goes directly into gear and locks up hard. I could chirp the rear tire on my stocker under power shifts... but if you are sitting casual and just going for it, be warned.

As far as the Honda gears, they are good but the Reaper removes a lot of slippage that keeps the tranny alive when it was designed for a 6 year old. Just back off the throttle slightly when shifting for no issues. And it will spin up like a mofo with an IR on the other side of the crank.

If you need the aluminum tool used for installation, let me know I still have one and no use for it.

~E

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dr damage

· #16 · Jan 12, 2009

i run a kitaco ultra 88se with a tb manual clutch conversion

had it for 3 years and it just did this

time for the billet clutch basket i think

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Z50King

· #17 · Jan 12, 2009

this is only happening to clutches mounted on the crank right?

i ran my crank mounted clutch with irk for about 2-3 hours with no problems. the china head blew up first

fiveho

· #18 · Jan 12, 2009

Z50King said:
this is only happening to clutches mounted on the crank right?

yes

Z50King

· #19 · Jan 12, 2009

sweet

moto234

Discussion Starter · #20 · Jan 13, 2009

i would love to get a special clutch but i cant afford the 600 bucks. someday ill be able to afford it tho then ill go for it

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