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Bachelor party idea CT70.

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#23 ·
Your heart is in the right place but cruising safely at 55 with safety power to spare aint cheap for these little motors. Multiply that times three and you guys might as well just go to 'vegas, get hookers and go blind.

Get 3 Lifan 140s or 150s and plan a more realistic route! You may find that you have more road options than engine options.
 
#25 · (Edited)
I am running the 184 V2 with an s35 cam and pe28 and it pulls like a freight train. Geared at 17:31 on 10's and it has no issue taking on the hills at speed. I haven't put a ton of mileage on the motor, but last summer it hung with the big bikes in the mountain passes of North Georgia at the VJMC rally. We did an easy 60 miles in the heat and though some steep passes and it was even geared worse than listed above. (16 28 ) Also- as stated above, oil changes are super cheap insurance for these little bikes. Change often, and adding a shot of Lucus is also an excellent practice. -HFM
 
#33 ·
People that hang out on PlanetMinis.com build everything from beater frame cracking stump jumpers, to show stopping bling voomit, to as-new fromthe fatory restorations. What do you need the end result to be? Do you want to hear people say, "Yeah dude, build an Anima 190 with nitrous and turbo..."?

What is the criteria for these bikes?

Do you want to keep and love the bikes and build them for longevity after the party?
Do they need to last only for the length of the party, then if they blow up or become maintenance nightmares you sell them?
Do you want to enter them in bike show competitions?
Do you want factory original restorations?


How many total bikes?
Do they all have to have the same specs?
What is the budget per bike? Is $2K per engine okay?

All of these things must be understood for anyone to give meaningful input.
 
#34 ·
I honestly don't have any valuable input other than I only have a 125 engine in mine that's street able. I like it for now but I'm feeling hungry for more power.
I would like to upgrade the engine one day but I don't know what I'd want but I'd keep it stock.
The 155 e start looks nice, even a yx160 engine maybe just maybe the 140 engine.
 
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Discussion starter · #35 ·
Like any dork I want it all. Lol look good, run good, last long, and the cheaper the better. Lol. Budget I have for the 3 bikes is 3000 or so for the motors. Including carb, electronics, and chain and sprockets.

Have any of you guys ran a set of those piggy back shocks on the ct? And I am thinking about running some pit bike forks with the disk brake up front. Custom triples I know, but I can make them.
 
#40 ·
Hmmm...i think you need to think realistically about the speed you want to achieve while riding. If you want to run 55mph, no matter what hills are thrown at you, you simply need to add the necessary power to do so. Those were listed in the configurations I provided earlier. You can build those, complete, for about $950 each which would include the carb and intake...I don't see a reason to make your own intakes.

If you can live with less power and don't mind rapping them out in 3rd gear going over the big hills, then you can live with a stock 150. However, that won't really provide much if any additional power of the 140 midblock configuration...so look here: https://wholesale-cycle.com/product/1143/140cc-Piranha-Engine/ and that will get you pretty close to what you need. 50 on the flats all day without over stressing it. Add in a performance Cam and a VM26-606 and you will be good to go.

For piggyback shocks, most of them are junk. The best shocks for the price, would be the takegawa 330mm that can be had for about 120 a set.

Gearing, go to honda50.com and use the calculator. Think of the absolute max top speed the engine is capable of and make that your target at 10000 rpm. Then work backward to derive your gearing requirement. 70-72mph would be the top speed for that 140...so then work backward.

Suspension...if running the pogo front ends, replace them with something else. The trailbuddy 30mm conversion works great with new oil and 1" preload adjusters. Your St90 suspension is already up to task...heavier oil, and preloads will drastically improve it. Stiffer springs even better.

You'll want additional fuel capacity as well. MDS cans work ok. The solution you presented earlier is a good one...i had that on one of mine for a long time.

Tires...4.0x10 Bridgestone ML16 and 17...IMO best tires for a CT70.

Lighting...if you plan to ride at night, you'll need to update. Since you're going to be converting to 12v motors, I recommend the trailtech HID's that run about 15w per and mount up 2. They are really bright. I have a set on one of my bikes...they are awesome.
 
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