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Post by jeepsteve92xj on Jul 21, 2013 16:13:31 GMT -5
A few weeks ago My exhaust broke and then the upper ear on the right die of the motor broke out - the ear where the top of the swing arm and upper muffler bracket used to mount. Muffler, no biggie. Swing arm... a little mote important.
I spent one weekend building up layers of JB weld epoxy, grinding the face where the swing arm sits, drilling and tapping the threads. That worked for a while, but on Friday I discovered a chunk of the JB weld was missing.
Time for the next attempt...
So I tried to aluminum braze / fill in the broken bit, that didn't work, I took the motor all the way out and brazed it right side up = much easier and it worked. adjusted the valves, cleaned the surfaces and put on new RTV, checked the spark plug, pretty clean, mostly white, gapped at about 0.032, Installed the new variator "Teflon coated" and a NCY variator plate, with 12gram sliders, cleaned and repaired the plastic shrouds (super-glued the brittle bits back together!), installed a pod air filter on a radiator hose and PVC conduit. extension, drilled out an old 102 jet to 118, installed the 118 jet, Also changed the #32 to a #38, reinstalled the engine, cut and installed a new exhaust gasket, fired it up and adjusted the idle to 1700, went for a 2.8 mile test ride, RPMs are low but I did hit 52mph at only 7900 rpm.
How's that for a run on sentence!?!?
Thunderstorm rolling in, couldn't stay out and play.
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Freshman Rider
Currently Offline
Posts: 55
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Joined: Jul 8, 2013 0:35:19 GMT -5
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Post by djscootz on Jul 21, 2013 16:19:59 GMT -5
Quite the project. Hopefully it all works out for you with the swing arm. I can't imagine trying to fix that myself.
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Post by jeepsteve92xj on Jul 21, 2013 22:11:20 GMT -5
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Post by jeepsteve92xj on Jul 22, 2013 9:13:48 GMT -5
For whatever reason, the MyTracks app only recorded the last bit from when I turned into the driveway until I parked.
I saw a high of 7900 RPM and the speedo actually hit 65mph. I don't think I've seen over 60mph on the speedometer before. But with no MyTrack record, I'm not sure my actual top speed this morning.
original rollers were 17gm, I ran the 10gm sliders for a while, and now running 12gm. Maybe I'll do 10/12 mix next weekend.
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Post by jeepsteve92xj on Jul 24, 2013 8:02:58 GMT -5
Well now!
I'm sure it is just this crap phone. Again today, I turned on the GPS and opened the MyTracks app before I even stepped outside and geared up.
I started the Znen, geared up except for the second glove, hit the START RECORDING button on the app, stuck the phone in my pocket, locked the phone, gloved the hand, hit the road...
On the road I saw 8200RPM max. The speedo showed over 65MPH. Then traffic slowed me down.
I got to work.
Unpocketed the phone, ungloved, unlocked the phone,
And the app said "waiting for GPS signal".
Son of a bummer!
No data. Well, nearly no data. Total Time is shown as 11:23. From when I hit start until I hit stop.
This phone is not good for much. Samsung Intercept. Android 2.2.1. No on board space to speak of for anything. Plenty of microSD @ 32GB.
Tonight I'll have to verify the GPS is working before I hit the road.
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Post by rockynv on Jul 24, 2013 9:56:34 GMT -5
Was there much play in the clutch shaft? On my Znen it was the bearings on that shaft that went along with drive face gooving which caused all my muffler breakage issues. The clutch had also started to get shaken apart and had to be replaced also. Many forget to grease the needle bearings inside the clutch that ride on the clutch shaft which has to be done every time you remove the clutch to service the belt and variator.
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Post by jeepsteve92xj on Jul 24, 2013 10:09:37 GMT -5
I haven't taken apart the clutch at all yet. The springs may be weak. At idle it is grabby, jerking continually waiting at lights. Idle is set to 1600. The plate calls for 1700 +100. Earlier I thought maybe it was just the heavy rollers and 2000 idle.
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Post by rockynv on Jul 24, 2013 20:42:28 GMT -5
I haven't taken apart the clutch at all yet. The springs may be weak. At idle it is grabby, jerking continually waiting at lights. Idle is set to 1600. The plate calls for 1700 +100. Earlier I thought maybe it was just the heavy rollers and 2000 idle. You should slide the clutch off the clutch shaft when you replace the belt or service the rollers and inside the center of the clutch bore are sets of needle bearings that need to have fresh grease applied every time you open the case for belt or roller service. You do not disassemble the clutch to perform this required maintainance. If you don't regularly grease these needle bearings that have no inner race so that they ride directly on the clutch shaft/gear case input shaft the clutch can start to wobble and score the input shaft of the gearcase and then destroy the gear case bearings. The wobble is what is many times responsible for cracked mufflers and mounts along with rear bodywork failures. |
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Post by jeepsteve92xj on Jul 24, 2013 21:59:25 GMT -5
I'll try to check that this weekend.
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Post by scootnwinn on Aug 5, 2013 12:00:56 GMT -5
I installed a huge windshield. I now sit in a giant bubble of calm air. It may be too big we will see how it works out. I figured I would start R&D before the winter cold got here. My daughter helped with the paint scheme (though we did refuse her polka dots) and I think it adds a bit of eye catching visibility. It was definitely nice not needing to get into the full racing crouch this morning to maintain 60 mph...  I also added a switch for my auxiliary headlight so I only need to turn it on when it is dark. |
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Post by sailracer on Aug 5, 2013 19:50:01 GMT -5
[replyingto=jeepsteve92xj]jeepsteve92xj[/replyingto]Did you ever get any temp. readings on the cylinder? I'm curious to know just where the threshold of heat is before it gets dangerous. I picked up a thermometer with a probe. It's good to 480 degrees F I'm thinking of mounting it and sticking the probe to the cyl. Whats a normal temp for you?
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jet