 | » Ezine | | Want to receive a monthly Ezine with great content? Subscribe here. | | 155z or yx160 install Posted in Mini Chat  | | 
14-10-2009, 03:22 PM
|  | Senior Member | | Join Date: Jan 2007 Location: central coast
Posts: 1,447
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oo yer i reckon it would be better with an irk but i havent actually used one before so i dont actually know...by the way thump the 1/8 turn throttles are really good but i need to grind a littlebit away from the inside as the knobby bit of the throttle cable kept catching it if you get one you will know what i mean but its an easy fix with a dremel...
these 150s would definately go good with a cam, ported an polished, HD valve springs, HC piston, HD clutch springs probly would wanna do plates too and a hydro clutch and of course an oko flatslide i find the 26 is good as it still has a power from the middle and builds very strongly from there...from what i hear the 28mm are just top end screamers
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14-10-2009, 03:50 PM
|  | Certified MR Member | | Join Date: Nov 2008
Posts: 948
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Originally Posted by pitbikekid  oo yer i reckon it would be better with an irk but i havent actually used one before so i dont actually know | Well you reckon wrong. 
IRK sacrifice massive amounts of tourque. A tradeoff which is just not worth it. It decreases usable traction by a tonne. Yeah you can get the back wheel spinning very easily but can't transfer that efficiently to the ground.
ORK are the go. Slight torque sacrifice for a quicker revving motor.
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14-10-2009, 04:34 PM
|  | Flux Capacitor Tuner | | Join Date: Aug 2008 Location: adelaide
Posts: 2,521
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^^^ might have to disagree with you there BarryDawsonman, but to a point... Yes i agree wholeheartedly IRK's sacrifice a lot of torque, and *can* spin up and lose traction easily...
BUT... If you've got the skills to hang on to it, stay into the motor and the clutch and throttle control to keep it hooked up, i'd go with the IRK over and ORK...
I'm being slightly argumentative, but for what it's worth, i'd say go ORK if you arent a complete throttle jockey... as you've stated.. IRK for Pros, ORK for Ho's.. lol..
Like i said, just being argumentative.. 
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14-10-2009, 05:06 PM
| | Certified MR Member | | Join Date: Nov 2008
Posts: 948
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Originally Posted by thump*140 ^^^ might have to disagree with you there BarryDawsonman, but to a point... Yes i agree wholeheartedly IRK's sacrifice a lot of torque, and *can* spin up and lose traction easily...
BUT... If you've got the skills to hang on to it, stay into the motor and the clutch and throttle control to keep it hooked up, i'd go with the IRK over and ORK...
I'm being slightly argumentative, but for what it's worth, i'd say go ORK if you arent a complete throttle jockey... as you've stated.. IRK for Pros, ORK for Ho's.. lol..
Like i said, just being argumentative.. | I was waiting for it. Are you implying that I'm a Ho? You sir are correct.
I just find the ORK is the right balance of both and has a lot more usable traction and power. I don't find it any harder to hold onto an IRK at all. Just harder to get a decent amount of traction especially out of corners on a track. I have done quite a few 360's out of corners being right on the gas and just spinning.
With the IRK, if you get a step up or any incline, the thing dies in the ass real quick even under high rev's I have found. Plus if you trail ride your mini's they are useless on hills. Only way up the big stuff is to seat bounce the crap out of it.
Actually, I see why you like them now ya fudge packer!!  |
14-10-2009, 06:48 PM
|  | Junior Member | | Join Date: Jul 2009
Posts: 18
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Originally Posted by thump*140 ok possibly a stupid question... The Lifan 140 motor is generally regarded as a tough little unit... with the exception of the kickstart... And the Lifan 150 is apparently a good step up...
With the usual 140 mods done to a 150 (IRK or ORK, cam, OKO, big bore pipe, port matching, polished manifold etc) how much difference is there in performance between the Lifan 150 and the 155z/160yx motor?
There's a lot of pissing and moaning about cases and gearboxes of the the 155z/160's...
having had no experience with the lifan 150's, are they really that bad??
or just neglected?? | its got the lifan 150 engine in it at the moment done an oil ring after a couple of rides so was just going to replace it with either the 155 or 160 mainly for looks but yeah dont mind either so just want the more reliable engine out of the 2
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14-10-2009, 07:12 PM
| | Senior Member | | Join Date: Jan 2007 Location: central coast
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why the hell would replace an engine for looks...
you sir must ride with m/m
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15-10-2009, 09:47 AM
| | Junior Member | | Join Date: Jul 2009
Posts: 18
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Originally Posted by pitbikekid why the hell would replace an engine for looks...
you sir must ride with m/m | not just for looks as i said b4 its done the rings and i have found the yx 160cc engine has more parts available that i have found
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15-10-2009, 09:59 AM
| | Junior Member | | Join Date: Jul 2009
Posts: 18
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the fella from the local pitty shop told me it would be not alot of difference in price if i just changed the engine but he deals in atomik crap can anyone point me in the right direction if this isnt correct
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15-10-2009, 10:07 AM
|  | Certified MR Member | | Join Date: May 2007 Location: north brisbane
Posts: 1,879
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whats not alot of different in price??? 155z to 160 ???
and whats atomik got to do with your engine swap????
maybe read word your above post....im having difficulty understanding what your getting at...
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15-10-2009, 10:27 AM
|  | Senior Member | | Join Date: Dec 2008 Location: singleton/glendonbrook(a hole)
Posts: 2,202
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Hes saying that the mech in the local pittie shop deals with atomik and that there isn't much price difference between the 160 and??? Well thats what I got out of it.
Look at DHZ they'll point you in the right direction. Goodluck with it.
DHZ: DHZ MINI MOTO - Engine
Last edited by bulldog93; 15-10-2009 at 10:52 AM.
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155z or yx160 install
