3rd wheel

kirrbby

Well-Known Member
Ok, current problem...carb hits the tank fuel outlet.
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I stretched the frame 2", forward of the tank, the tank stayed back, close to the seat. I have a tall cylinder engine which puts the carb 6mm farther forward than the stock motor. I'm also using a VM20 carb which is taller than the stock carb. I'm pretty sure my intake is the dratv left turnout...24mm at the carb end, and about 20mm at the engine end. And...the carb hits the tank. The rearmost, ON outlet comes down on top of the choke/primer knob. There is room to move the carb straight down, or maybe farther back. I
I need to... cut the intake to lower the carb, about ¼". Add a spacer or thicker insulator at the carb/intake joint to push the carb back, maybe ½". Relocate the tank outlet. Different intake or carb.

I decided to cut/lower the intake.

I jigged it up and and first tried the disc sander...not the best. Then I made a cut on the table saw, and went back to the sander...the sander just wasn't getting it done. So I made another cut on the table saw, then just cleaned it up with some 320 grit on a flat table top.

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kirrbby

Well-Known Member
Then I went after the choke knob, for a little insurance.
Hopefully, I'll mount it up tonight. See if it clears.
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Deoodles

Well-Known Member
I used a chop saw from harbor freight to cut a steeper angle on mine. Worked great and took less than 30 minutes to cut and mount. That was a few years back. Still running it today.
 

kirrbby

Well-Known Member
Well that worked. The tank clears just enough.
The carb is still about ⅛" or so above the engine.
And now I can just barely, R&R the topset for tuning...and I DO mean barely.
The carb currently has 20/115 jets in it.
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kirrbby

Well-Known Member
It was mighty cold yesterday, but I fired up the trike and let it warm up a bit in the driveway.

It's LOUD! I knew it would be. The spanglers muffler is the same as the $20 Chinese muffler that I was trying to quiet down a year or 2 back. Right now, the head pipe extends maybe 3" INTO the muffler...it needs to be cut off. That might help a tad..?
I also ordered up a db killer, silencer to try. I won't be able to tolerate the noise as it is now...I know that for sure. Hopefully it can be made better/quieter.

I rode it down the street, maybe 2 blocks, to the corner and back. This is going to be a whole new adventure I think. It's a strange little beast, with 3 wheels. I quickly remembered why they banned the three wheelers.

I made a list of everything that still needs to be done. It's pretty long.
 

kirrbby

Well-Known Member
We've gotten 3-4 inches of new snow here over the last couple days. So yesterday after work, I cleared the drive and walks and porches. Then I warmed up my trike for a blast. I've only ridden it for 2, very short, and cold test runs, but it was ready.

Took it to the high school to slide around the parking lots. What a blast too. It took me a while to start getting comfortable with it. Trikes don't turn well on 3 wheels. You either tip them up onto 2 wheels, or you spin the rear end around with the throttle. I can't imagine a better clutch setup for this machine.
SS LS1, if you're reading this...this clutch/engine, in this ATC70, was your idea. Your idea of a better clutch. Manual clutch, AND still will idle in gear at low rpm. Perfect.

I can drift this thing all over the place on snow covered pavement. If I lose it...spin out or whatever...I just let off of the throttle and let it drop back to idle. OR, I can grab the clutch, slip it to bring the rpms back up. The way I was riding...basically just sliding everywhere I went...I was giving the clutch a workout. I think I'm geared a little too tall as is. I got into 4th gear a couple times...just to see if it worked
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Accidentally blasted straight off of the pavement and into a mud bog once...got a little messy.

I'm a big ol pansy in the cold weather. Plus I don't have very good cold weather gear. About 40 minutes, in a snow storm, I was thoroughly frozen. I had a ton of fun for 40 minutes.

Before and after.

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Gary

Well-Known Member
Hey now I resemble that remark! It's how I destroyed my 50's original licence plate assy and fender way back in the day :LOL:
 

Gary

Well-Known Member
I spent a lot of time riding in the cold,I actually sold the CR when the river didn't freeze over for the 3rd year just didn't have anywhere else to ride that thing. In my younger days it built character- even got frostbite once. Don't know what it could to to kirrbby at this stage of his life though ;)
If you look close at that last picture you can see the sheet metal screws in the tires for one last go. I no longer get any enjoyment out of cold weather.
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kirrbby

Well-Known Member
I bought 2 different types of "DB killers"...silencers, to try in my muffler(s). They are just too loud to tolerate. The first to arrive was the one with the honeycomb inside...it's too big to fit in these mufflers easily, and I didn't want to start cutting on the muffler innards before I could try style #2.
#2 has holes punched in the sides, and the end is capped. It installed pretty easily into the black muffler, and it sounds MUCH better to me. So I put one into the Spangler muffler too.

Installing it requires you to drill out the rivets and disassemble to muffler. Cut about ½" off of the inner metal tube, then put it back together with the silencer in the inlet end of the muffler.
Mine is ready to install for a test run.

The Spangler headpipe is slightly too big to slip into the black muffler, so I couldn't really run the black one unless I ream it out a fuzz...then it wouldn't fit the other headpipe properly.

Here are some pics. I'll post up my opinions after I run the modified muffler some. I'm hoping it's gonna sound good, and not restrict my 114cc engine.

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kirrbby

Well-Known Member
I think I have this bike jetted right, 22.5 pilot and 115 main in the VM20. I have a K&N filter on it now too.
I dropped a tooth on the counter sprocket to make it 16 and 36 on the rear.
It's been pretty consistent at 57-58 <<<EDIT...47-48>>> for the top speed, and the lower gearing seems better for a toy, climbing hills, sand and snow, etc.

The exhaust is pretty tolerable with the dbkiller in there, but I don't know if it's restricting the engine at all. I doubt I'll know for sure unless I swap to a different exhaust for a try. But even if it is, I'd imagine it's only at top speed, and top speed isn't particularly safe already...3 wheels is twichy...lol

It is a fun and challenging ride tho. Well worth the effort.

I need a new battery. And I still need to get the taillight installed and working. Need to change the front tire too before it comes apart on me.
Tie up loose ends on the wires and hoses. And I would like to fix up a better tank before I add stickers.
I definitely need a new handle on the pull start. The pull start is pretty challenging too, with this engine.
As she sits.
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69ST

Well-Known Member
That's more than respectable top end. It takes more power to move one of these 3-wheelers than a CT70. Getting close to 60mph on a suspension-less 3-wheeled machine is scary fast. IOW, I think you have adequate hp stuffed into the boiler room of this one.:whistle:

Turned out well, nice work!(y)
 

lukelaw1

Active Member
Possy rear end does make for harder steering aka collar bone killers lol. Both tires are driving the same pushing the front tire. Drove an old Kawasaki bayou that had possy and a lever for slip differential food for thought.

Nice work btw.
 

kirrbby

Well-Known Member
That's more than respectable top end. It takes more power to move one of these 3-wheelers than a CT70. Getting close to 60mph on a suspension-less 3-wheeled machine is scary fast. IOW, I think you have adequate hp stuffed into the boiler room of this one.:whistle:

Turned out well, nice work!(y)

Oops...47-48 is the top speed. I typed that wrong above. 57-58 would definitely be scary.

Possy rear end does make for harder steering aka collar bone killers lol. Both tires are driving the same pushing the front tire. Drove an old Kawasaki bayou that had possy and a lever for slip differential food for thought.

Nice work btw.

Ya I should have mentioned that straight axle and no suspension. It's a big part of the challenge. You have to be thinking every time you want to turn...paying attention, and have a plan. lol Fun AND challenging ride.
 
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Tripod

Well-Known Member
Any updates on this? Not much in the way of mini trails available lately, so my hunt has shifted for an ATC70 or a TRX. Or a US90...
 

kirrbby

Well-Known Member
Any updates on this? Not much in the way of mini trails available lately, so my hunt has shifted for an ATC70 or a TRX. Or a US90...
No real updates. I still don't have a working taillight. Haven't done any more work to it. But I do ride it occasionally. It's a really fun bike to bomb around on. My favorite is buzzing the neighborhood after a snow. It's well worth the time and money that I put into it. But about a hour ride is all I usually want...so I probably only have about 10-12 hours on it now.

I did buy another beater a while back...non running. And I also bought another...basket case partial bike last summer.
I'd like to build another, without the frame stretch. I think I might like it better if it were more wheelie happy...since that's the way I typically ride it. A hour long bonsai blast, then back home.

I would recommend getting one tho...if you're interested. Only drawback for me is that it takes up a lot of space when you're NOT riding it...and it doesn't move as easily as a 2 wheeler when you push it.
 

kirrbby

Well-Known Member
Any updates on this? Not much in the way of mini trails available lately, so my hunt has shifted for an ATC70 or a TRX. Or a US90...
FWIW...
When I started considering buying a ATV...I asked the good folks over on PM...which is more fun, 3wheeler or 4??
The answer was 3 wheels are funner than 4. Having both, I'd have to agree. The 3 wheeler is a challenging ride. You have to pay attention, and you need to develop some skills to ride them. The 4 wheeler is a little more of a no-brainer.
 

Tripod

Well-Known Member
Trying to find a nice atc70 is on par with finding a z50 hard tail. Would i be better off to pony up the extra money for a complete atc or go with a frame and work my way up?

I think i may be better suited to a complete atc since it would nickel and dime me to death trying to locate each and every part.
 
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