Stock Chinagirl Riders- Got a minute?

GoldenMotor.com

Slogger

Member
Sep 8, 2014
544
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nohio
My bike and results are a little unusual I'm sure. I have a long background in auto and motorcycle racing. I have a goal to race one of these at the Bonneville Salt Flats so my speed goals and expectations are very high. I am ordering a bunch of parts friday to see what I can get on the 44 tooth but the following mods will be gearing and aero to really push the limit. I must say this is the most fun i have ever had with a racing goal. I know your thread was for stock China girls, so I hope I wasn't butting in I wanted to share what i got with the stock stuff starting this project out. I am enjoying following the thread, there are some awesome bikes on here :)
Yeah, your bike is too hot for the original idea of the thread, but I'm no thread nazi, and the idea of the forum is to have fun talking about our bikes.
You are welcome anytime, ol buddy.
I'm new at all this so I want to be able to select gearings for the basic engine, but no two bikes are the same, so the original idea is faulty anyway.
There is no standard China doll, everyone messes with it to one extent or another.
.wee.
 
Dec 11, 2014
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Tucson
Oh crap. I just re read what i wrote 2 posts back. The way i started the sentence "Slogger," was meant as a greeting. Re reading it makes it sound condecsending. I'm really sorry I should have read it before posting. I really hope you didn't take it that way, I mean to have the most respect for you, and all on here so please take it that way. My appologies, Lee.
 
Dec 11, 2014
628
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Tucson
Oh good I'm glad. I really like this thread, part of my bike build included seeing how far I could get toward goal with a stock Cina girl. I think gearing wise with my calibrated butt dyno the stock motor would pull a 40 tooth on a 26" wheel. That being said, I gasket matched mine before ever riding it. I really like the red cruiser a few posts ago. That is a great example of what these fun little motors should be doing. The set up with the flat bar, long pipe, just all around build looks like a comfortable, fun, practical, bike to ride everywhere, everyday. I want one like that pretty bad, but style wise thinking rat rod style but that same basic concept.
 

Slogger

Member
Sep 8, 2014
544
4
18
nohio
Yeah, Boxcar's cruiser is plumb duded up. It has everything you need on a bicycle and the cg pulls it along just fine.
For a hundred and a half, a stock cg can more than earn its keep on a utility bike.
With my bad leg I wouldn't be able to ride my bicycle very far at all without one. Now I'm all over town.
 

Davezilla

New Member
Mar 15, 2014
2,705
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San Antonio Texas
Yeah, Boxcar's cruiser is plumb duded up. It has everything you need on a bicycle and the cg pulls it along just fine.
For a hundred and a half, a stock cg can more than earn its keep on a utility bike.
With my bad leg I wouldn't be able to ride my bicycle very far at all without one. Now I'm all over town.
I guess I haven't posted in this one yet, but mine was never truly stock since my Fred head came in a day before the engine kit came in so you guessed it, the Fred head on and the stock head off and sent to another member in here...
I did ride it with just this mod and all the rest of the engine stock and un touched by me. The best speed I was getting out of it at the time was like 28mph, and just a tad quicker, but unrecorded with the muffler end cap removed.

On mine I was doing a basic checkup on the engine after it had about an hour and a half run time on it and noticed the crank had excessive side to side play. I asked around in here and found out that wasn't normal so I pulled the engine to investigate. In the process I pulled the crank and trued it up on my lathe, that thing was sloppy at best, but while doing other mods to the case I decided to buy a Dax bottom end so I could get the bike back on the road sooner while I was doing other mods to the bottom and and the cylinder porting. This bottom end became my mock up engine and I used it to do all my porting on the jug as well as setting port timing etc... Needless to say by the time I got the Dax bottom end the jug had some rather extensive port work done to it, the piston was ramped to match the exhaust port and transfers, the transfer openings at the bottom of the cylinder were knife edged and the casting ridge was also removed from the transfer openings as well as putting a nice chamfer on all the ports and a radius on the exhaust port roof to prevent ring snags.

Got thte bottom end in and did a quick transfer match, checked everything several times and assembled the engine. This time around the engine had a noticeably more agressive sound to it and it was reving sky high... No more stock engine now... Took it for a test ride and was running 33 to 35mph on the first tank of gas, and by the second tank it was starting to loosen up and go a bit faster, took the gps out with me and recorded a top speed of 38 mph, then a few rides later it hit 41 and once it hit 42, but this is definitely not stock. I'm still using the stock NT carb tho as well as the 44 tooth rear sprocket so that gives ya an idea of the rpm this one's churning out...

Anyway... as far as top in "close to stock" trim, which was bone stock except for the Fred head, it was officially 28 mph, the bike is a 26" mountainbike and weighs around 50lb after the engine was installed, then add 225lb of me on it.
 

Davezilla

New Member
Mar 15, 2014
2,705
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San Antonio Texas
oh.. yeah, what I was quoting you about was that I got the engine kit originally so I could still ride after messing up my ankle and having surgery on it a few years back, it left me in a wheelchair for 2 months, then I needed a cane to walk on for nearly 2 years... getting better now but still not good enough to pedal for any distance
 

Slogger

Member
Sep 8, 2014
544
4
18
nohio
You guys are good with those dremels. If I want to go fast I'll know how to do it. ;)
Sorry to hear you hurt your ankle that bad.
I stepped off the third step up, thinking it was the bottom when I was hurrying around trying to get a big plating machine shipped out on time. I loused up a bunch of tendons and twisted the foot under. I don't think it will ever get better than it is now, which isn't too good.
 

Davezilla

New Member
Mar 15, 2014
2,705
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San Antonio Texas
I'm in the same boat here... I was working in the flight deck in a 747 and called off to do another higher priority job so I was coming down the ladder / stariway to the main deck and had to kinda squeeze passed another guy working interior panels, took a step to go down the steps and that step wasn't there... my tools and me shot down the 8 foot drop and I landed flat on my back on the cargo floor.
I got myself up and people came rushing over to see if I was ok, I told them I felt ok, but when I started moving around I noticed my foot was hurting and starting to get hot... not good.. I got my boot off and my ankle was already swollen like a balloon.
They sent me to the emergency room and I got X-rayed, told there was no fracture and sent home. 4 days later I go back to work but notice right away it's hard for me to walk more than about 50 feet at a time.
Medical at my work checked me out and sent me out for more X-rays, more X-rays and no fractures so they told me to keep weight off my foot for a while and put me on light duty for 2 weeks. After that I was able to walk a little better but still felt very grindy and painful to pivot my ankle... I got tired of medical over there just jerking my chain so I went out and saw an ankle and foot specialist who took tons of x-rays from every angle possible.. still, no fractures, but it was swelling up and acting like it.
long story short, they sent me to therapy for 6 weeks and that made it worse so the doctor decided surgery was needed to go in anr remove some scar tissue that might be causing the pain, swelling, and irritation. In the meantime they put me on light duty again at work, basically letting me work jobs on the floor but not on the plane, I would get the parts, do the repairs, then someone else would reinstall the parts. This lasted 6 months, then I had to go to surgery.
The doctor told me the operation would take about 30 minutes and that I'd be beck in therapy after about 3 or 4 days.... Nope...
I wake up and the recovery nurse is telling me I can't put any kind of weight at all on my foot for 6 weeks. They gave me crutches to get around on but with my bad back the crutches and I weren't getting along so I ended up in a wheelchair during this time and for a few weeks after the cast was removed. After I sa the docotr again he told me I need to start walking on it but to take it real easy, he put me back in therapy for another 10 weeks, recommended more therapy but workman's comp wouldn't cover any further therapy.
What happened when I fell was it tore the cartilage in my left ankle joint, when the doctor went in to fix it I was under for 3 hours and what he did when he saw the torn cartilage and the growth going everywhere but back together he shaved all the cartilage off the bone. The cartilage don't grow back but scar tissue fills this void, that's why no weight was allowed on my foot for 6 weeks.
It took about a year after the surgery before I could get around half way decently and I had to use a cain to walk anything more than about 50 feet or so. I used the cain for about 18 months but when I started my own business I started to notice my foot wasn't quite so sensative about 3 or so weeks after leaving Boeing. I'm thinking it was just that I needed to get away from going up ladders, stairs, and stands etc to give my ankle a chance to heal some more. I don't need the cain anymore and hadn't needed it for about 4 months,but my foot still gets sore and weather changes really bothers it a lot, but for the most part I get around pretty good now, just not as good as before and I doubt it'll ever be as good as it was before.
 
Dec 11, 2014
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Tucson
Davezilla, that's rough brother, i can really relate. I have broken a lot of bones. I fortunately have a .com job now so it's not hard on me physically. I know it wasn't your intent at all but since it came from me could you mention what business you started if any of us could possibly support it?
 

Davezilla

New Member
Mar 15, 2014
2,705
10
0
San Antonio Texas
I opened up an auto repair shop after Boeing laid me off last year and I specialise in alignments, brakes, and suspension but I'll take in all repairs... just did a head gasket fix and timing belt change last week.

But for my foot problems, a lot of the problems went away when I started working for myself... I'm in full control and I can set the pace if I do start hurting, but just getting away from all those stairs and stands I had to climb repeatedly on a daily basis really helped me the most because I can handle any job that comes in with ease now... for the most part, the cold and any quick weather changes will slow me down but I can still handle a lot of work now that I'm staying on the ground most the time.
 
Dec 11, 2014
628
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Tucson
If your doing alignments and ever need work, you could let the local SCCA people know. Most shops will only set cars to factory specs and auto crossers can go thru heck trying to find someone to set alignment to the specs they ask for. Good luck on your shop, I hope it's going well.
 

Davezilla

New Member
Mar 15, 2014
2,705
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0
San Antonio Texas
Yup... I do a lot of race cars, custom hot rods and aftermarket suspensions that other shops wont touch and I get a lot of cars that have been rebuilt after being wrecked, a lot of times they don't get the frame as straight as it needs to be so aligning to specs will get you nowhere near driving straight. With these cars and trucks they need to be driven and adjusted sometimes several times before they drive right. Race cars also need to be aligned a lot different from regular cars so you set the toe out instead of in in order to bite into the turn much better, more camber also gives better cornering traction but not that rediculous looking fad that people are intentionally over cambering for looks... the caster is set for faster turning in favor over better stability, and every driver has their own settings they like. I get their business because other shops just turn them away.

Ive also done brake upgrades & diisk brake conversions on older cars as well as lift kits on trucks and 4x4s because other places turn these jobs away either because they never did the jobs before or just don't want to be liable if they cant get it to drive right etc etc....
 
Dec 11, 2014
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Tucson
Sounds like you have it going good Davezilla. I used to time attack race an RX7 and we only have one shop in the whole city of Tucson that does race car alignments correclty amd to request. I see tge lowered 240's and old Supras driving around with camber like you mentioned and it looks like they broke an axle ha ha ha. Actually I take that back, I have seen cars with broken axles that don't look that bad.
 

Rudz

New Member
Jun 24, 2014
454
1
0
Tyler TX
26“ wheels
SHA carburetor
#61 jet
Slant head
Rocket cdi
44 tooth sprocket

I get off the throttle at 30, only taken it there a couple times, not really trying to blow this one up. I'm 259 lbs plus at least 20 lbs in gear, spare parts and tools.

I topped my last one out at 32 mph, I firmly believe this one can do the same
 

Slogger

Member
Sep 8, 2014
544
4
18
nohio
26“ wheels
SHA carburetor
#61 jet
Slant head
Rocket cdi
44 tooth sprocket

I get off the throttle at 30, only taken it there a couple times, not really trying to blow this one up. I'm 259 lbs plus at least 20 lbs in gear, spare parts and tools.

I topped my last one out at 32 mph, I firmly believe this one can do the same
That's about 7000 @30, 7500 @32, about as good as it gets with a more or less stocker, Rudz. I'm a heavyweight, too my bike might go that good with its short manifold and a 44.
 

Rudz

New Member
Jun 24, 2014
454
1
0
Tyler TX
I'm using the z manifold.

The bike is a heavy tank, I am a big strong dude and I have trouble picking it up, lmfao.

I took my exhaust cap off one day, much more power, but loud as **** and my hearing sucks, so everyone else probably hated me. I put the cap back on
 

Slogger

Member
Sep 8, 2014
544
4
18
nohio
I'm using the z manifold.

The bike is a heavy tank, I am a big strong dude and I have trouble picking it up, lmfao.

I took my exhaust cap off one day, much more power, but loud as **** and my hearing sucks, so everyone else probably hated me. I put the cap back on
That's interesting. My bike (z manifold) is all bottom end and gets wheezy above 5000 rpm.
Did you get that high rpm with the muffler opened up?

I have to keep it quiet, part of my deal with the local fuzz.