Planet Minis

Dogboy · 05-07-2008, 03:56 PM

I'm currently building a budget street Z50 currently with a lifan 140cc engine in it. I also have a 12v z50 engine in pieces and over the next 12 months plan to save up some cash and slowly rebuild it.

I'll want to put a 4 speed and manual clutch and want to know what bore/stroker/head kit will get similar performance to the 140cc?

If parts are going to add up to $700-1000us I want it to be alot more reliable then the lifan. I'm in Australia and we can get lifan 140cc for around $200us, so I need to know that the engine will be similar in performance and last 5 times as long as a lifan for it to be worth it.

Which are the best quality/priced kits?

Thanks in advance.

Here's a pic of the build so far.

Brent878 · 05-07-2008, 03:59 PM

its going to be hard to get anything for 200 bucks. A 4 speed trans is going to cost more than that, a manual clutch is going to cost similar to that, a bore up kit is going to cost more than that.

But if I were to guess anything over 108 with a good head and oil cooler is going to be faster and more reliable than the lifan but cost a whole lot more.

Nice bike by the way, i like the dual exhaust setup.

Grafixxs · 05-07-2008, 04:00 PM

I can't answer your question but I can tell you that looks nice so far!

Dogboy · 05-07-2008, 04:04 PM

Quote:

Originally Posted by Brent878

its going to be hard to get anything for 200 bucks. A 4 speed trans is going to cost more than that, a manual clutch is going to cost similar to that, a bore up kit is going to cost more than that.

But if I were to guess anything over 108 with a good head and oil cooler is going to be faster and more reliable than the lifan but cost a whole lot more.

Nice bike by the way, i like the dual exhaust setup.

Thanks for the reply, but when I mentioned in the original thread $700-1000 this was the budget I was looking at.

Cheers.

Brent878 · 05-07-2008, 04:22 PM

what forks are those? I think i have those same forks that some retard sold me and said they were CRF70 forks. I haven't been able to figure out what they are except that they are not CRF70 forks, hehe

firepower354 · 05-07-2008, 05:04 PM

Sweet bike. A TB 117 and AHP 4 speed will get you close, and may squeeze under your budget. I'd personally get an alloy 57mm top end for your 140, do the 70 clutch drive swap and ride it.

50ryder420 · 05-07-2008, 05:16 PM

that front rotor is massive.

nice bike good luck with the build

patman · 05-07-2008, 05:48 PM

TB RH 108,TB manual clutch,APH 4 speed transmission.The TB 108 will probably eat the Lifan 140 for lunch and still be hungry when it's done.

Dogboy · 05-07-2008, 10:35 PM

Quote:

Originally Posted by Brent878

what forks are those? I think i have those same forks that some retard sold me and said they were CRF70 forks. I haven't been able to figure out what they are except that they are not CRF70 forks, hehe

The forks are a 31mm Skyteam front end.

05-07-2008, 03:56 PM	#1 (permalink)
Dogboy 1st Gear Member Join Date: Oct 2007 Location: Australia Posts: 101 My Mood:	12v honda engine vs lifan 140cc I'm currently building a budget street Z50 currently with a lifan 140cc engine in it. I also have a 12v z50 engine in pieces and over the next 12 months plan to save up some cash and slowly rebuild it. I'll want to put a 4 speed and manual clutch and want to know what bore/stroker/head kit will get similar performance to the 140cc? If parts are going to add up to $700-1000us I want it to be alot more reliable then the lifan. I'm in Australia and we can get lifan 140cc for around $200us, so I need to know that the engine will be similar in performance and last 5 times as long as a lifan for it to be worth it. Which are the best quality/priced kits? Thanks in advance. Here's a pic of the build so far.

05-07-2008, 03:59 PM	#2 (permalink)
Brent878 3rd Gear Member Join Date: Dec 2005 Location: Southern California Posts: 2,147	Re: 12v honda engine vs lifan 140cc its going to be hard to get anything for 200 bucks. A 4 speed trans is going to cost more than that, a manual clutch is going to cost similar to that, a bore up kit is going to cost more than that. But if I were to guess anything over 108 with a good head and oil cooler is going to be faster and more reliable than the lifan but cost a whole lot more. Nice bike by the way, i like the dual exhaust setup.

05-07-2008, 04:00 PM	#3 (permalink)
Grafixxs Old Fart Join Date: Apr 2007 Location: Marshall,MI Posts: 2,014 My Mood:	Re: 12v honda engine vs lifan 140cc I can't answer your question but I can tell you that looks nice so far!

05-07-2008, 04:22 PM	#5 (permalink)
Brent878 3rd Gear Member Join Date: Dec 2005 Location: Southern California Posts: 2,147	Re: 12v honda engine vs lifan 140cc what forks are those? I think i have those same forks that some retard sold me and said they were CRF70 forks. I haven't been able to figure out what they are except that they are not CRF70 forks, hehe

05-07-2008, 05:04 PM	#6 (permalink)
firepower354 Advertiser Join Date: Oct 2006 Location: Flint MI Posts: 12,348 My Mood:	Re: 12v honda engine vs lifan 140cc Sweet bike. A TB 117 and AHP 4 speed will get you close, and may squeeze under your budget. I'd personally get an alloy 57mm top end for your 140, do the 70 clutch drive swap and ride it. __________________ If it has my name on it I did it;) FirepowerMinis.com 810-237-9537 M-F 9-6 Custom FPM parts and engines. Parts and service for all makes. Honda Trail Bikes parts and accessories. Piranha/Medina/Thumpstar bikes, parts, engines and accessories.

05-07-2008, 05:16 PM	#7 (permalink)
50ryder420 2nd Gear Member Join Date: Apr 2005 Location: Thousand Oaks, CA Posts: 335 My Mood:	Re: 12v honda engine vs lifan 140cc that front rotor is massive. nice bike good luck with the build

05-07-2008, 05:48 PM	#8 (permalink)
patman 3rd Gear Member Join Date: Aug 2006 Location: Minnesota Posts: 2,210	Re: 12v honda engine vs lifan 140cc TB RH 108,TB manual clutch,APH 4 speed transmission.The TB 108 will probably eat the Lifan 140 for lunch and still be hungry when it's done.

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