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Post by AtariGuy on Oct 31, 2017 19:26:40 GMT -5
ok i get what you're saying - but the exploded diagram of the rm125 still shows a castle nut to set the preload? Speaking of castle nuts... them sons of pickles on my stem are jammed solid. Gonna notch them, fish out a punch, then grab ahold of "persuasion", the 3 lb mallet. P.s. 32mm hex locknut, 44mm hex adjuster on a tng venice... |
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Post by AtariGuy on Oct 31, 2017 19:33:56 GMT -5
Just a lil wiring to sort through... 
Mocked the engine back up to it to get some profiles, angles, n stuff measured... 
A closer up view from the right side at the head stock. 
Stupid nuts... |
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Post by 190mech on Oct 31, 2017 19:47:45 GMT -5
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Post by AtariGuy on Oct 31, 2017 21:42:35 GMT -5
Lol nice - i'm gonna be turning a solid shaft however instead of using a tube - so it'll be threaded on the lathe
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Post by AtariGuy on May 8, 2018 22:20:04 GMT -5
Threw the ol bird back together to ride for another season.
Engine's still good and strong, but noticed the front wheel's out of alignment, pretty sure it has to do with the rough front pinion shocks, one's pretty damn flat and the other still has a hint of life in it. I'd replace them if i planned to keep that front fork setup, but i'll be replacing it. Hopefully mid season rather than over next winter... hopefully...
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Post by AtariGuy on Feb 1, 2020 14:42:06 GMT -5
UPDATEEEEEEEEEEE
I mentioned I'm doing a scratch engine build in the general section - that engine will be dropping into this scooter and I'll be putting the shortcase orange beast aside. I don't plan to use anything from this engine, it's going to be put home on my tribute shelf as is. My first 2 stroke engine rebuild.
But this new engine will be taking its place, it's been part of a much larger plan with this whole scooter. I have a few other bits for my frame rework that i'll be posting as I get back to it - and yes, it's been discussed a bit in the last handful of pages. The focus of my postings here will be my engine build. The frame modifications are still being measured and readied for welding and wiring. That stuff probably won't be posted until I have a considerable amount of progress to show for my work.
It begins...
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Post by AtariGuy on Feb 1, 2020 14:45:45 GMT -5
I dont think this is relevant much to you guys but I'm using this post specifically as my gather/do list. I'll edit it as I start collecting everything, but for the most part, if I'm forgetting something or you have a better recommendation for what i'm looking into, by all means please do include it. I should also note that - as much as I love Brents builds (and even have a great template to basically copy it - TPR86 series) - I would like it to be my own. There's still a lot of great advice like the third bearing support which I do plan to use to strengthen it, there's still stuff I'd like to try on my own. Especially where it comes to the cylinder/crank/exhaust combos, carb/reed/filterbox setups, ignition, and so forth. Some of the information I have already researched and planned, some of it will be coming later as my budget allows. By no means is this a racer. It's a daily cruiser that I'd be plenty happy with at 50-55mph - maybe a good tailwind downhill peak in the low 60's. Long wide open roads with basic rolling hills, no mountain climbs. A little bit of city riding - but the average ride is probably 40+ miles of open country backroads - temps varying from 50F to midsummer humid heat in Minnesota. Again, i'm not racing - and i'm not doin wheelies or burnouts, just cruising. It's my 2wheel therapy. -------- SAVE FOR EDIT - NOWHERE NEAR COMPLETE YET ------------------- Bearings (preferred SKF or Wiseco) - Seals - Gaskets --See 2 Stroke Tech section for Minarelli bearings and seals --6200 bearing - third support bearing. ( 90GTVert - would you include this option in the tech library?) Bolting Gearbox --eton beamer primary drive shaft --gearset to approach 11-1 ratio (Brent suggests S6 set) Variator Cylinder/Crank Intake Exhaust Stator/Ignition Mounting/Misc |
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Post by 90GTVert on Feb 1, 2020 18:12:19 GMT -5
That third support bearing is a 6200. Not just a 6200 series. Same thing as what's in the spot right beside it for the intermediate shaft.
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Post by AtariGuy on Feb 4, 2020 13:00:06 GMT -5
Great news! My parts arrived! I'll be posting the freshly pictured parts as soon as i can, but i do have a question about the final drive cover - it seems theres a manufactured hole in the bearing seat of the output shaft. Is this actually normal? Or should i try to jbweld it closed. I'd be concerned about oil leaking out or roadspray getting in.
I'll try to post a couple pictures using desktop mode with my phone to show ya'll...
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Post by AtariGuy on Feb 4, 2020 13:03:15 GMT -5
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Post by oldgeek on Feb 4, 2020 13:32:42 GMT -5
That's a weep hole. If you get gear oil coming out of it, you know your final shaft seal on the other side of the sealed bearing is leaking.
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Post by AtariGuy on Feb 4, 2020 14:08:21 GMT -5
Ok thank goodness - I'd be concerned otherwise =D Thanks oldgeek! |
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Post by AtariGuy on Feb 7, 2020 17:39:16 GMT -5
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Post by AtariGuy on Jun 21, 2020 15:59:04 GMT -5
The Angry Chainsaw seized up on me as I was heading to work Wednesday. Still not 100% on why it happened, but it ended up being a soft seize. Piston's shot, cylinder can be honed clean again. For my reference later, the piston is a hoca 47mm kit on a 12mm pin. 25mm compression height and 48mm to edge (49mm to dome). Anyway, i had the old pfs universal parts kit that ended up being a factory second that i'm attempting to use. I did double gasket shim the base with ultragrey - 1.1mm over the transfer floors, copper sealant on the deck, hoca kit head, and squish measures 1.8-1.95mm - kinda sad the hoca cylinder's down. That cylinder (iirc) was 0.7mm with awesome port timings. Gonna ride a few weeks on this cylinder til i get the hoca honed, then play with the shop lathe and deck the UP cylinder about 2.5mm and port it for scientific research... or somethin. I did say i was gonna attempt that at one point.
Right now its airtesting. 3.4psi at 320pm - after 40 minutes, its at 3.25psi. I'd call it passed.
Since it's out today. I'm gonna full service the cvt and gear oil. And wash it. Holy joe dirt...
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Post by oldgeek on Jun 21, 2020 16:52:48 GMT -5
Make sure and clean/check the carb and jets good. Sometimes dirt ends up in the jets and sends you unknowingly to leanville!
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