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Search took 0.02 seconds. Search: Posts Made By: jimjr21
Forum: Zongshen RX3 08-11-2015, 10:16 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I can't wait to get into the mountains like you...

I can't wait to get into the mountains like you guys to really push the RX-3. Too much pavement around here.
Forum: Zongshen RX3 06-01-2015, 10:20 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I finally measured how much fuel it took to cover...

I finally measured how much fuel it took to cover the fuel pump. Starting with a completely dry empty tank filled to cover pump while on center stand. It took just over 1 quart or little less than...
Forum: Zongshen RX3 05-21-2015, 05:08 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I spy: beefy case guard 4 spot lights neat...

I spy:
beefy case guard
4 spot lights
neat seat cover
Stainless steel front brake line
handguards without interior mount
nice wrap on a white bike
Forum: Zongshen RX3 05-11-2015, 03:27 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Also remember that as part of a typical dealers...

Also remember that as part of a typical dealers PDI they will check these items that we are finding loose and tighten them. We are each dealing with it individually. Not the outside of public eyes...
Forum: Zongshen RX3 05-08-2015, 12:58 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Two curves at the bottom deal with fuel. ...

Two curves at the bottom deal with fuel.

Straight upwards is amount of fuel used.

Inverse curve shows efficiency of transferring potential energy of fuel into mechanical energy.
Forum: Zongshen RX3 05-07-2015, 04:39 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
25.6hp @ 8994 rpm This is a brake dyno of some...

25.6hp @ 8994 rpm
This is a brake dyno of some type. Easy to tell by the rpm time trace. Engine is at maximum rpm then is pulled down to lower rpm over 6 seconds. These types of dyno's are hard on...
Forum: Zongshen RX3 05-04-2015, 09:49 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Complete engine weights 69-70 lbs. Oil is drained...

Complete engine weights 69-70 lbs. Oil is drained but I know some is trapped in there.
Forum: Zongshen RX3 05-01-2015, 09:53 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Yes a bit more involved. Been kicking around...

Yes a bit more involved.
Been kicking around ideas with other engine builders and we tend to not include the technical details of each possibility as we are familiar with them. I responded here...
Forum: Zongshen RX3 04-30-2015, 08:27 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
There are clearances from crankshaft and rod...

There are clearances from crankshaft and rod assembly to the surrounding case. These clearances have to be maintained.
So if you have a 24mm crank pin stock and switch to a 22mm pin. Keep the...
Forum: Zongshen RX3 04-28-2015, 03:10 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Making a stroker crank is easy. Just go to a...

Making a stroker crank is easy. Just go to a smaller crank pin diameter. However that is also a way to make it less reliable.
I will be looking for a reliable way to make a stroker crank. However...
Forum: Zongshen RX3 04-28-2015, 12:54 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I am making or having them made.

I am making or having them made.
Forum: Zongshen RX3 04-28-2015, 11:51 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I am working on performance upgrades. Big bore...

I am working on performance upgrades.
Big bore kit
valves
cams
will be testing other items as well
Forum: Zongshen RX3 04-22-2015, 06:53 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Initial dyno test. Inertial type at rear...

Initial dyno test.
Inertial type at rear wheel.
16.60hp @ 8230 rpm
12.47ft/lb torque @ 5950 rpm

I will try and get some graphs loaded.
Forum: Zongshen RX3 04-21-2015, 05:32 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
This is exactly what the engineers expect. 25% of...

This is exactly what the engineers expect. 25% of capacity to cool fuel pump.

http://californiascooterco.com/blog/?p=14589
Forum: Zongshen RX3 04-21-2015, 03:22 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Fuel pumps need to be immersed in fuel to not...

Fuel pumps need to be immersed in fuel to not overheat and fail.

Total volume of fuel tank is not useable without damaging fuel pump.

So 4.2 gallon tank
~3.3 useable volume
~2.5 till Empty...
Forum: Zongshen RX3 04-21-2015, 02:50 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
First fill up. 2.685 gallons at 161.0 miles =...

First fill up.
2.685 gallons at 161.0 miles = 59.96mpg 75% highways 55-65mph 50% 2 up

Flashing Empty on gauge at 143.3 miles.

Based on this I think an extra 50 miles range once Empty...
Forum: Zongshen RX3 04-21-2015, 09:09 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I would look for exhaust leak. Here are...

I would look for exhaust leak.
Here are reasons why.

Immediate wind with heat. Radiators take a while to heat up. Instant heat leads to exhaust.
Right side has three possible locations that...
Forum: Zongshen RX3 04-20-2015, 08:55 AM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
9.2lbs including clamp and heat shield There...

9.2lbs including clamp and heat shield

There is a catalytic converter in the very front of the muffler. It is about 3" long and about that in diameter.

Biggest obstruction is the end tube on...
Forum: Zongshen RX3 04-19-2015, 05:05 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Hehe Full wet weight includes all fluids to capacity.

Full wet weight includes all fluids to capacity.
Forum: Zongshen RX3 04-18-2015, 05:50 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
This would be personal preference. And you are...

This would be personal preference. And you are blending springs and dampening into one question. If going lots of off road and aggressive may want same oil but stronger springs.

If hard core...
Forum: Zongshen RX3 04-18-2015, 02:47 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
No. Without the accessory guards, luggage racks,...

No. Without the accessory guards, luggage racks, or luggage.
Forum: Zongshen RX3 04-18-2015, 01:26 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Initial ride report at just over 100 miles. ...

Initial ride report at just over 100 miles.

It has been a while since I was on a street bike with such low power. Power was sufficient to run 65-70 on highway two-up and keep up with flow or pass...
Forum: Zongshen RX3 04-18-2015, 01:13 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Initial build items. Check ALL the bolts for...

Initial build items.
Check ALL the bolts for tightness. Repeat ALL the bolts.
Check header to rear brake line clearance
Check evaporation system tube to header clearance (below battery behind main...
Forum: Zongshen RX3 04-18-2015, 01:01 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
I had 4 bikes delivered Thursday. Have 3...

I had 4 bikes delivered Thursday.
Have 3 assembled
1 has over 100 miles so far. I will give setup and riding information later as I work the bugs out of all the assemblies.

Weights tested on...
Forum: Zongshen RX3 04-18-2015, 12:58 PM
Replies: 5,437
Views: 14,241,066
Posted By jimjr21
Factory line is black rubber coated with braided...

Factory line is black rubber coated with braided steel liner and teflon plastic inner sleeve.
The braid is more coarse than the Russell Stainless Braided line that I had to replace it with on the...
Showing results 1 to 25 of 69
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