What is your CT70's top speed??

[expygator]

What is your CT70's top speed??

I've been asking about performance upgrades that I could do, but based on the responses I'm getting, I will leave mine alone and just ride it. It seems that it runs pretty good for a stock one. Mine runs 46-47 flat out and it burrys the 50 mph speedo going down a hill. I weigh 165 lbs.

What kind of speed are you getting and with what mods?

Dean

 

[cottielee]

That sounds pretty good to me. I have a '71 SL70...basically the same motor as yours and I got about 47 mph on the flat when I weighed 200 lbs. Now I am down to 185 lbs and am wondering if I picked up a few mph.

 

[WonderMuscle]

I have a K1 with a cam'ed YX150 and my bike will do 72mph. Too fast for that bike and the motor sounds like it is going to explode. I don't do it often but when I do it always puts a smile on my face.

 

[ez50]

12V TB88 race kit 15/33 sprockets 170 lbs. 52 mph

 

[Adam-NLV]

My 1970 Honda CT-70 Trail-bike with Stock 72cc engine's top speed was 38MPH.

It had lot's of torque and was super reliable, kinda wish I didn't sell it. You made a good choice in leaving your motor be.:77:

 

[fatcaaat]

1970 Honda CT70 with Nice 175. I've had this to 80mph and there is more left.
1971 Honda CT70 with GPX177V2 and port work I've had this to 85mph. It was tapped out.

 

[Adam-NLV]

What is your CT70's top speed??

I've been asking about performance upgrades that I could do, but based on the responses I'm getting, I will leave mine alone and just ride it. It seems that it runs pretty good for a stock one. Mine runs 46-47 flat out and it burrys the 50 mph speedo going down a hill. I weigh 165 lbs.

What kind of speed are you getting and with what mods?

Dean

Not trying to open a big Can-O-Worms but here goes anyway!:hi:

If you changed your bikes rear sprocket size by a few teeth LOWER, and you say your doing 46-47mph flat out, you could probably break the 50 mph mark by that sprocket change. You will lose speed off the line but top speed will improve.

 

[OLD CT]

I like to keep my budget under a thousand for a modded CT70 engine/bottom end.70 mph is what the gps says and isn't that fast enough on these little bikes anyway?Even being able to run on the highway doesnt make sence or enjoyable being it's so small.I feel out of place if you know what i mean.I can jump on my big bike for that.50 mph roads are the prefered routes.$900=70mph. Wonder how much more cash does it take to do 85mph>The price vs speed costs much more for that extra 15mph more i'm sure.

 

[69ST]

I just knew that, someday, I'd come to regret not investing in canned worm futures...:21:

Sorry Adam, even the healthiest stocker isn't going to respond well to more than about a 1-tooth change, at the wheel...a 3% increase, 1.5mph at the same rpm. 4 cubic inches can only produce so much torque.

I like to keep my budget under a thousand for a modded CT70 engine/bottom end.70 mph is what the gps says and isn't that fast enough on these little bikes anyway?Even being able to run on the highway doesnt make sence or enjoyable being it's so small.I feel out of place if you know what i mean.I can jump on my big bike for that.50 mph roads are the prefered routes.$900=70mph. Wonder how much more cash does it take to do 85mph>The price vs speed costs much more for that extra 15mph more i'm sure.

A core theme very nicely summarized, and with a much smaller word count than I can manage. The CT70 is an odd-shaped canvas, that we happen to like. But, it's a shape doesn't lend itself to every possible composition. A bone-stocker is really only balanced up to the stock top speed, Honda engineers knew what they were doing. With chassis/brake/suspension mods, the bikes can handle low freeway speeds pretty well. IMO, the design "hits the wall" in the low-to-mid 60s. Beyond that, tiny wheels, light weight & short wheelbase don't play well with rough pavement and wake turbulence from passing tanker trucks, etc. I couldn't agree more... 50mph roads are the preferred routes and that 70mph is plenty fast. Rolling along, at 65mph, in the far right lane of a 4-6 lane divided highway on a CT feels like being in a bad remake of "Death Race".

The dollars-per-mph discussion places many cans of worms in front of the electric opener. The 80/20 rule applies and there's more than just horsepower to consider. For this post, at least, suffice it to say that the cost curve becomes progressively steeper with every additional mph above ~60mph...even if a big (160cc+), sub-$2K, PRC engine is part of the mix. Unless someone wants to extend this type of discussion further, I'm stopping here, before I've hijacked this thread, outright.

 

[OLD CT]

I left alot on the table i guess.With lots of engine choices.A better question is ''how fast does your ct70 go with a engine case stamped ct70?''A lifan 140 could do 70 geared properly but at what longevity right?

 

[Adam-NLV]

Gotta agree with the consensus here...If I wanted to do 75mph +...I'd get a bigger bike and running on the freeway? Forget about it! White knuckle...In Cali I drove my bike back and forth to Berkeley working at a TV repair shop commuting via I-80. Didn't consider that 'enjoyable' but rather a necessity to earn money.

Now, I rarely mingle with city traffic and in fact live twenty five mile North of the city with access to lot's of open roads and plenty of trails that IMHFO is what riding's all about. The L110cc is perfect for that!

BTW There's a great cruising spot in the Berkeley Hills called Grizzly Peak (Northern Cal), now that's a hell-of enjoyable ride up to 1,700ft. Use to do that one on Fridays waiting for freeway traffic to die down--->Grizzly Peak (Berkeley Hills) - Wikipedia, the free encyclopedia Totally worth it.

 

[fatcaaat]

I can turn your stock motor into a 75mph road machine pretty easy. There are lots of options anywhere from a china motor to rebuilding your stock motor to sourcing a honda nice or building on an xr50 platform. Honda japanese parts simply cost more, but are more reliable.

What do you really want/need and what do you want to spend and we can make very clear recommendations.

 

[chuckklr04]

77 mph with a Honda Nice 142cc. Pearl river LA to Daytona FL 65mph cruise via I/10 interstate.

 

[OLD CT]

Long time no hear chuck.Good to hear you have a reliable power plant now.I went to Daytona a week before bike week this year with my ct,1100 miles each way in the back seat.100 miles down there on the bike.

 

[69ST]

I left alot on the table i guess.With lots of engine choices.A better question is ''how fast does your ct70 go with a engine case stamped ct70?''A lifan 140 could do 70 geared properly but at what longevity right?

That may have been a good thing...learn from my (sometimes bad) examples (that is if you haven't done so already) of what happens when you try to cover too many possibilities in too much detail...mind-numbingly long posts that get crushed to death under their weight. There are a lot of "right" answers, it's up to the individual to decide, based on individual circumstances & preferences. You, Adam, Jarred, Chuck have all found them , each differing from the others, in some way. IMHO, it's perfectly fine to have personal biases as to what constitutes a successful build..."different horses for different courses"...

I got virtually identical numbers from my 137 Nice powered bike, as Chuck is now getting from his 142 Nice...in 2005. I've not taken it past 65mph, since. I ride with an open-face helmet, not really compatible with freeway speeds. That'd change with time. Nothing feels fast for very long, a spiral I've chosen to avoid for once. In this state, our frost-heaved, patches-on-top-of-patches-on-top-of-patches, third-world, pavement beats machinery to death at sane speeds and freeway traffic moves at 75mph+... while drivers text, gab, eat, etc. Most of my riding is within 60 miles of home...lots of stop lights with 40-55mph in-between; the true "speed" involves using gravel roads to get around traffic, so road tires are out. That's just the practical side of the equation, which next gets filtered through personal preferences. Both may be applicable to no one else here, and that's the point of that first paragraph.

 

[chuckklr04]

Long time no hear chuck.Good to hear you have a reliable power plant now.I went to Daytona a week before bike week this year with my ct,1100 miles each way in the back seat.100 miles down there on the bike.

Just went to Daytona in the spring for bike week on a 1983 passport with 120cc lifan. Did about 1200 miles
A passport to Adventure? Or the slow way to Daytona FL?

Rebuilding the 142cc Nice to 160cc for a run to the Barbour vintage days. Should be around 650-700 mile round trip. Plan on using the interstate for maximum shock value. Getting a gopro for the soon to viral youtube vid.

 

[blacufo]

I have a stock 71 CT70 3speed, I put a 35 tooth on the rear.
It will cruise at 35-40 on the flat with 190lbs rider.
I can push it to 45+