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Forum: Zongshen RX3

04-06-2021, 12:38 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

Yup. New head and big bore kit should be here...

Yup. New head and big bore kit should be here before the weekend. I hope to have the bike back together and put 300+ miles on it before my trip the following weekend.

Charles.

Forum: Zongshen RX3

04-05-2021, 03:40 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

So, at around 3800 miles I checked the valves...

So, at around 3800 miles I checked the valves again and they were within spec, but my compression was down to 85psi cold. Should be 100psi cold. Since I have a big bore kit on the way, and hopefully...

Forum: Zongshen RX3

03-18-2021, 07:53 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

I've been using lucas stabilizer. I can get a new...

I've been using lucas stabilizer. I can get a new head with valves in it shipped and delivered by march 29 for $215 if I pay for express shipping from aliexpress. So that's likely the route I'll go....

Forum: Zongshen RX3

03-17-2021, 08:08 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

Problem is the valves. First adjustment was at...

Problem is the valves. First adjustment was at 500 miles as per the previous owner.

Bike didn't make it to the second adjustment. It was stalling and unbeknownst to me the exhaust valves were...

Forum: Zongshen RX3

01-21-2021, 02:00 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

It's an NGK Iridium plug that is recommended for...

It's an NGK Iridium plug that is recommended for the bike. I've got the valves adjusted again and will give it a ride later today to see if my top speed is back. If this is going to need a valve...

Forum: Zongshen RX3

01-17-2021, 09:04 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

Also I did a compression check. 65psi cold. It...

Also I did a compression check. 65psi cold. It was 95 cold (100 warm) after adjusting my valves in November. So it’s looking like tight valves are to blame again. I’ll pull it apart sometime during...

Forum: Zongshen RX3

01-17-2021, 09:01 PM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

I’ve got a iridium plug in there. Put it in at...

I’ve got a iridium plug in there. Put it in at 2000 ish miles.

Charles.

Forum: Zongshen RX3

01-17-2021, 10:20 AM

Replies: 15

RX3 Power down at high speed, 40mpg

Views: 2,278

Posted By ChopperCharles

RX3 Power down at high speed, 40mpg

Just a month ago I was running 80mph indicated on flat and level ground, and easily powering up hills on the interstate without dropping below 75. Yesterday I took the bike out, and I could barely...

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