YX150 vs YX160...compare and contrast...

[fatcaaat]

I'm seriously considering the purchase of a YX style motor for a street application and looked at a long list of different upgrades that are available for it.



There are some interesting factors and I'd like to get some of your thoughts on the subject.



YX150 - Bore/Stroke = 60/53. Most bore kits I see are skirtless and probably drop the piston 2mm into the case. Anyone concerned about longevity on this?





YX160 - Bore/Stroke - 60/57. Most bore kits will drop the piston skirt into the case about 4mm. Now I'm concerned.



Are there any kits available that leave the cylinder skirt on?. How big? Are they compatible with the V2 head?

[PlanetMinis.com]

[nielspbr]

How good is your german Monkey Shop Raubling

Do not know about reliability though

[aedwards07]

NCC has bore kits with a full skirted piston/cylinder.

[T Bolt USA]

dude

right here

TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » TB YX160/ GPX /OGM 177cc KIT

[fatcaaat]

dude

right here

TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » TB YX160/ GPX /OGM 177cc KIT

Does this have a skirted cylinder? I'm getting mixed information on this.

[357 Racing]

Theres skirted and un-skirted BBK's. But un-skirted piston's dont work on 160's. But theres drop on kits that make the 160 a 177 and so on.

[fatcaaat]

Theres skirted and un-skirted BBK's. But un-skirted piston's dont work on 160's. But theres drop on kits that make the 160 a 177 and so on.

This is what I want. A drop on kit, that makes a 160 a 177 and is compatible with the V2 head.



I can't see this on any Vendor's site though...or maybe my lack of knowledge of this engine base is the problem.

[357 Racing]

Are you going the v2 or +r?



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » TB YX160/ GPX /OGM 177cc KIT



Thats the kit for the 177.



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » .TB YX/GPX /OGM RACE HEAD V2 KITS



This one you can order the BBK with the head and stuff. (order the 63mm)



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » yx 150 26/28mm intake (ogm/gpx)



Youll need that if you want a rear facing carb.

[fatcaaat]

Are you going the v2 or +r?



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » TB YX160/ GPX /OGM 177cc KIT



Thats the kit for the 177.



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » .TB YX/GPX /OGM RACE HEAD V2 KITS



This one you can order the BBK with the head and stuff. (order the 63mm)



TBolt USA, LLC » Pitbike Engine Parts » YX 150/160 PARTS & KITS » yx 150 26/28mm intake (ogm/gpx)



Youll need that if you want a rear facing carb.

Thanks for the input...Does this mean I have to buy a piston that I'll never use? The cylinder kit comes with a piston...then I have to get a different piston that is compatible with the v2 head.



Its all a bit confusing.

[357 Racing]

Just the head

Honda Trail Bikes





You might need to but the V2 and 63mm piston kit and try and find just the 63mm jug.

[fatcaaat]

Right off of TB's site:

This kit is for YX/GPX150 or 160 engines with our older (now discontinued) 165 bore kit already installed.



So, the 150 kit that makes 165 or the 160 kit that makes 177 is discontinued. That basically leaves no options for someone with a 160yx due to the stroke.



The 63mm kit is the only one with a skirted cylinder to accomodate the longer stroke and it is discontinued. Hmmmm....

[fatcaaat]

Im looking for a kit that has just the head, race head piston, and jug.

Yes....This is ideal...in a 63mm combination, that makes a 160 a 177. That's all. However, from the reports that I've heard, maybe I should just stick at 160 and add the head and piston. Sounds like there could be trouble for clutches at 177cc.

[357 Racing]

Ya the clutchs or cases arent here just yet. TB just released that 63mm kit not to long ago. Well NCC is your only option. And just make sure you run a de-comp cam if you can.

[Paxracing]

Right off of TB's site:

This kit is for YX/GPX150 or 160 engines with our older (now discontinued) 165 bore kit already installed.



So, the 150 kit that makes 165 or the 160 kit that makes 177 is discontinued. That basically leaves no options for someone with a 160yx due to the stroke.



The 63mm kit is the only one with a skirted cylinder to accomodate the longer stroke and it is discontinued. Hmmmm....

Do you want the 150 yx kit with the skirted cylinder to make it a 165.

[fatcaaat]

Do you want the 150 yx kit with the skirted cylinder to make it a 165.

I want to buy a YX160 base motor. Onto that motor I'd like to install a V2 head and a 63mm piston. The cylinder MUST have a skirt that extends into the crank case.



If I buy the two TB kits, I end up with an extra Piston

If I buy the new TB kit, I don't get the Skirt that extends into the crankcase.



Anyone know why TB discontinued the 63mm 165/177 kit?

[357 Racing]

Cause the read these forums. :O Are you set on the yx160 with the 177 setup?







Ahp Minis



But it comes with the tb28 carb. I assume your going to run like a tm30?

[fatcaaat]

Cause the read these forums. :O Are you set on the yx160 with the 177 setup?

Set as in "Did you find what you're looking for" or "Set in that this is what you must buy?"



I am set in the sense that I want to buy this setup. I guess if I want it that bad I could buy the two kits and have a leftover piston which irks me pretty bad. I could also attempt to purchase just a 63mm cylinder from a vendor as well that still has the skirt on it.

[fatcaaat]

Cause the read these forums. :O Are you set on the yx160 with the 177 setup?







Ahp Minis



But it comes with the tb28 carb. I assume your going to run like a tm30?

Going to run a TM28-1 Pumper Carb most likely.

[357 Racing]

They saw how many motors that we have blown. Most of them being high cc's. But that doesnt make sense cause un-skirt seems to be a higher rish of something going wrong.

[fatcaaat]

I think it is less likely to come apart being in a street application though. This motor will be put in 4th gear and driven 60 miles at a clip. I think most people blow up the bottom ends before the tops go...If I just drive it on the street that sholdn't be too much of a problem.