190CC going in...

[Brofessor]

I'm using the same 190 in the K3 I'm building. Bought the same wiring kit with the headlights, blinkers, etc. it really was pretty easy, except I ran out of harness length at the taillight so I need to go back and make jumpers.
So the carb that came with the engine is junk? That's good to know before I started spending time trying to tune it. Is this it?

https://www.amazon.com/NIBBI-Racing-Performance-Motorcycle-Carburetor/dp/B076CHRKNZ

 

[OLD CT]

Thats the exact carb I went with. I paid 65 though. Shop around. You could use the factory supplied carb on it, till you put an order in with the place I bought it. Maybe you need foot pegs, or something else to make ordering it worthwhile?

 

[OLD CT]

I strapped the bike in the M/C trailer, removed the 140 and installed new connectors on my old harness and found a ct70 plug end in my stash, matched the wires. Added some female bullet ends for the separate solid green wire ''ground'' and the neutral green/red stripe wire. Engine is wired but not in yet. I removed the spark plug turn the key. Headlight came on, LED speedo, horn, blinkers work, full wave DC power. slid the kicker on temporarily and we HAVE spark!
Waiting on an oil catch can. Going to hook up to the crankcase breather on the back of the engine so it needs to be out until the catch can gets here. I will save my trail buddy harness for the 212cc build I have down the road. I bought a nifty little jump box that will fit in a jacket. No worries about needing a big battery in the bike. 26 bucks shipped. Awesome buy!

 

[fatcaaat]

THis: https://japan.webike.net/products/20020436.html

You need takegawa part 06-08-0124 for your brake plate. Pretty sure CMSNL has it as do others. You can find generic brake plate that is designed this way that mates up like a ct70...aliexpress or other places can dig up a cheap one I'm sure.

I have this exact setup on one of my own bikes.

CMSNL lists this: https://www.cmsnl.com/products/rear-brake-hose-set_060802/ This should be correct on the plate, but you'll have to ignore the rod and figure out the rod for yourself.

Just checked the takegawa catalog page 417. YOu can order part number 06-08-0124 or 06-08-125 or 06-08-02. The plates are all the same, the differences is in the length of the holder, which you won't use anyway.

 

[OLD CT]

More progress, I have the matching swingarm paint now. Just waiting for some better painting weather. A couple more odds and ends and I will fire it up. I have the gold bling dress up kit. Just waiting to change the oil to install the gold filter cover. That stuff will match the gold cooler going on.

 

[Brofessor]

I love the black hubs and the matching rear springs. What exhaust wrap is that? I'm using the same exact pipe on my 190.

 

[OLD CT]

Just generic header wrap. They have black wrap also. It is so worth it. No burned/overheated R/S leg!
When you are tweaking it, you won't burn your hands either! I am going black, next time.
And won't go back... The oil cooler bung is a rice paper away, glad I have the wrap.

 

[cjpayne]

Bike looks great OC!!!

Btw, where did you get the little blinkers? Are they L.E.D.'s? I'm constantly worrying about the headlight ears on my GF's K3 that she got from Ray. I even have to put it behind stuff in the garage, just to protect it from being bumped.

 

[hambone]

I like it, I bet sounds awesome.

 

[Robert thran]

Looks like a ct190 race could be in the brewing!!! Lol I’m thinking I better put my big carb back on the green carbon fiber bike with old CT’s tuning skills.. haha

 

[fatcaaat]

are my eyes seeing correctly...you have stock front drum brakes and suspension? Hmmmm...I suppose it's ok if you don't plan on going much faster than say 50 and you are using the high grade Kitaco anti-fade brake shoes...but wow. Tell me you made mods to the front forks such as stiffer springs, very heavy weight oil, and a set of 1" preload pucks? If you're going to make it, make it safe! I know for a fact that stock front drum brakes coupled with stock front suspension cannot handle the motor upgrade you've put in there if you ride it "spirited". A hard brake at 55mph is going to bottom out the forks. I know from experience. THe build LOOKS incredible for sure, but we want you to be safe too.

 

[OLD CT]

It has the HD springs and 4 ozs of 15 weight oil in each leg. The front end on the bike doesn't even move when I get on or off it. The inverts are not even close, as I have ridden my friend's bike with that setup. They start sticking with serious everyday use. The bike was popping up in the front when I off mounted. He got tired of messing with it after a few years and bought a stock front end. I do know you have the best/highest quality front ends you can buy. I am used to this front end and compession brake till 50mph from 65 previously. I am not pushing past 70, too old for that and have big bikes. I ride it on quiet 50 mph roads. If someone rides my tail at 50, I can at least pull away. Before this engine, I couldn't.

 

[OLD CT]

Breaking the bike in. It is a powerhouse. Nice and quiet with the nhrc pipe. No pissing off the neighbors. Lots of short trips 1/2 hr rides and oil changes. 50 degrees out and rolls along at 50 in 4th gear. Brrr! I shifted to 5th @ 50 that's the minimum you want to be going in 4th to shift to 5th, and only brought it to 60. Still breaking it in. 60 was not revved out at all. I may lower the gearing.
18-30 is a little too tall and will prematurely beat on the clutch slipping it to start in first. I might try 17 up front. Or 32 on the back. Or both!

 

[fatcaaat]

The easiest way to figure our your gearing is to make an assumption of top speed based on power. The zongshen 2v 190 that you have there makes a real 18 HP from the dyno's I've seen. So that said, it's safe to assume that your top speed should be about 80-85mph when optimally geared. I've had a lot of conversations with RacerX over the years about gearing, and while he and I do have a slightly different opinion, we always agreed to the method.

So what I would recommend is for you to get the gear ratios for this motor, including the primary ratio. Then, using that, and your tire circumference, calculate what gearing you need to have to make the engine pull 80mph at 9500 rpm in 5th gear. Then everything else will fall into place. You can also calculate it from the high side...maybe 85mph at 9500 rpm. Then this gives your base. Tweaking from here is simple..swap a front sprocket one way or the other.

I have my Nice 176cc engine setup this way. I run it 19/29 tooth and when I know I'm going to be doing nothing but mountain passes for one of my rides, I swap in the 18t front.

 

[OLD CT]

72 break in miles on the 190 so far. I went with a 17-33 and it really makes the bike take off. I didn't go far yet or take it on a 50 mph road to see if I like it yet. It was 28 degrees here today. Still went out though!

 

[dirtbkr188]

It was 28 degrees here today. Still went out though!

 

[OLD CT]

Brrr!

 

[OLD CT]

I ran it today, it's running well. 150 miles on it so far. Old 140cc oil cooler is on. Vendor sent the wrong bracket at first. Free spare now for a stock head. The vendor made good a month later. Still need the oil catch can, ''long wait'' = Thailand + the main jet assortment kit and the 10 inch kickstand I ordered. The kick stand that comes with this new foot peg setup, sucks. 8 inch. I have 350mm rear shocks out back. PULLS hard when you whack it at 50 mph in 5th @ 6200rpm! Working thru changes like needing the ''lil'' kicker, better to start it with and mosty important, out of the way! New longer clutch adjuster etc. It's not easy peazy. But workable.

 

[kirrbby]

I'm loving it OLD CT! Sounds like you're racking up miles quick...especially quick in late December.
Nothing good is ever easy...every modification requires 2 more modifications...
Which footbar did you get...which vendor? That kickstand does look like a shorty. You have slightly taller tires...but that couldn't account for a 2" kickstand shortage.
It pulls hard at 50, because it wants to take you to 90

 

[dirtbkr188]

It pulls hard at 50, because it wants to take you to 90

Here's Pat at 90MPH...lol