PlanetMinis Forums

1995 Pw 80

This is a discussion on 1995 Pw 80 within the 2 Stroke Pitbikes forums, part of the General Talk category; Started in on the mini's again, figured I'd share my latest. I scouped up this 1995 pw80.., ran perfect then and it sat for a ...

Page 1 of 2 12 LastLast
Results 1 to 15 of 27

Thread: 1995 Pw 80

  1. #1
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23

    1995 Pw 80

    Started in on the mini's again, figured I'd share my latest. I scouped up this 1995 pw80.., ran perfect then and it sat for a while. So before the clean up I just added fuel and oil, fired right up. Major smoke show Clicked it into gear, stalls. I can hold the revs and it wont die but something isn't right there. Took it up the road and back, and wanted to see how it revved and it just sounds very restricted. Also I forgot to check the crank case oil and it was a bit low but very clean, maybe that explains why the clutch was grabbing hard at idle, but it almost sounded like it slipped shifting? ..So.. I tore it down did the carb/tank clean which were both surprisingly clean. cleaned all ports out as the aluminum was corroding on top side. I read these things were extremely rich from factory, and guys were going up one position on the needle. I did that. Also removed the cone from the silencer, and the washer in the pipe was removed by previous owner. I haven't fired it up since the cleanout. It's turning out great. Before I reinstall the exhaust Im going to use a carbide bit on the 'coned' area where the flange meets the head, looks very restrictive as I've read on some other forums. Doing these mods so far, should that make a drastic difference in how it runs? Like I said I've yet to fire it up but I probably wont do much more other than maybe a top end, sounds like the cylinder has ovaled out a bit and theres some slap in there. Im on edge about removing the oiling system, only reason I want to remove it is for the more precise mixture..
    Last edited by Haywire; 06-15-2013 at 10:13 PM.


  2. #2
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Last edited by Haywire; 06-15-2013 at 10:11 PM.

  3. #3
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Seems my forks are out of wack, I straighten them and they end up being 'out' again in a couple turns. Do CRF 70 forks bolt right up?? I also just hogged the exhaust out, and when that cone came out, what a difference!.. Still haven't fired it up, I will this evening.

  4. #4
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Figured there would be more insight around here. Got it fired up, went back to the center location on the needle with the exhaust/intake upgrades. Runs awesome. Also found out why it stalled when clicked into gear, clutch plates are sticking from sitting for so long. Reputable shop in town had a bike with the same issue once. Nice little powerband pull now

  5. #5
    Junior Member
    This user has no status.
     
    MaCKiiN's Avatar

    Join Date
    May 2012
    Posts
    4
    Keep it up, nice work

  6. #6
    Senior Member
    This user has no status.
     
    234wheeler's Avatar

    Join Date
    May 2009
    Location
    So Cal
    Posts
    428
    As with most Yamaha's of that era, they used toothpicks for forks. You probably have a bent fork tube if it keeps springing back and looking twisted. Loosen the top caps and the lower triple clamps and spin the fork tubes. You should be able to see if one or both are bent. Lots of info on here for your bike, just search PW80 or BW80. Same basic bikes and engines. Check out pwonly.com. They have a PW80 section.
    Last edited by 234wheeler; 06-11-2013 at 12:48 PM.

  7. #7
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Quote Originally Posted by 234wheeler View Post
    As with most Yamaha's of that era, they used toothpicks for forks. You probably have a bent fork tube if it keeps springing back and looking twisted. Loosen the top caps and the lower triple clamps and spin the fork tubes. You should be able to see if one or both are bent. Lots of info on here for your bike, just search PW80 or BW80. Same basic bikes and engines. Check out pwonly.com. They have a PW80 section.
    I found that the main center bolt that snugs up the head was loose, tightened it back up and steering stays now. Im still going to turn them to double check if they are in fact bent. And that Pwonly site is good for a few things but it's pretty dead around there.. Jetting set back to factory and today I had the time to take it for a test burn. I have to say, with an adult on this bike, it definitely moves pretty good. Just going to keep cleaning things up. I pulled the plug and as is it's golden brown even with the factory oiling system. At higher rpms when reaching max speed it is burning some oil but down low in the yard it's a peppy machine. Might go overbore and mill the head down, not sure about this noise that sounds like piston slap, im thinking it's a small end or big end bearing on the con rod but Ill have to see when I pull the head. Any insight??
    Last edited by Haywire; 06-11-2013 at 10:10 PM.

  8. #8
    Senior Member
    This user has no status.
     
    234wheeler's Avatar

    Join Date
    May 2009
    Location
    So Cal
    Posts
    428
    Yeah, pull the head off. Considering your bike is 20 years old and the design goes back to the 80's I'd feel fortunate to have a store like pwonly.com that would even bother with these. The stealerships would be your only option. What do you mean when you say it's dead around there? They are the only business that's actually coming up with new items for these relics.

  9. #9
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    I was just talking about the pw80 tech threads, didn't look at the store at all. Im going to pop the head this afternoon

  10. #10
    Senior Member
    This user has no status.
     
    ds80/xr100r's Avatar

    Join Date
    Jan 2013
    Posts
    112
    Keep the oil pump on, it's more precise with it hooked up because it gives the right amount of oil to the throttle position and to the rpm.

    if only gas was cheaper

  11. #11
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Quote Originally Posted by ds80/xr100r View Post
    Keep the oil pump on, it's more precise with it hooked up because it gives the right amount of oil to the throttle position and to the rpm.

    if only gas was cheaper
    That's what im thinking, my plug looks great with the carb at stock settings, exhaust washer and coned section removed and silencer cone and pipe cut off.. I may just do a top end, I want as much power as possible whats a good size for an overbore?

  12. #12
    Senior Member
    This user has no status.
     
    ds80/xr100r's Avatar

    Join Date
    Jan 2013
    Posts
    112
    Quote Originally Posted by Haywire View Post
    That's what im thinking, my plug looks great with the carb at stock settings, exhaust washer and coned section removed and silencer cone and pipe cut off.. I may just do a top end, I want as much power as possible whats a good size for an overbore?
    I'm not a pw guy but I was researching oil injection and its just better to leave it on (taking it off will not add any noticeable power) I was thinking of removing it on my ds80

    if only gas was cheaper

  13. #13
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Im not sure mine is setup correctly, seems the plug is slightly on the darker side but still noticeably brown in color. Im almost 200 lb and this thing is quite fun compared to my crf50s in the past. Just a big kid!.. waiting for my kids to grow up some

  14. #14
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Dove into the clutch today, tons of life left on it for sure, but look old and the plates were marked up. Has some small markings I was able to clean up, probably enough to make the clutch grab at idle? I find its hard to click into neutral when stopped idling. Going to clean these up, reinstall, and see what happens.
    Also going to ditch 4 clutch balls, for now, space them evenly. See how this works out.
    Last edited by Haywire; 06-14-2013 at 12:01 AM.

  15. #15
    Junior Member
    This user has no status.
     
    Haywire's Avatar

    Join Date
    Jun 2013
    Location
    Can, BC
    Posts
    23
    Got it back together, click it into gear, still stalls. I took 6 balls out and it feels a lot better, but im going to toss 2 back in.

    Im going to try to dial the carb in some, and check that the float level is in spec. I got the pod filter on there now, cone shaped K&N style..

Page 1 of 2 12 LastLast

Ads

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. 1995 rm 80 motor
    By dustinmoto425 in forum KLX110/Midsize Parts for Sale
    Replies: 0
    Last Post: 10-14-2010, 08:43 PM
  2. WTB 1995-1999 z50
    By nitefreak in forum Bikes and Parts Wanted - All Makes
    Replies: 0
    Last Post: 03-02-2010, 09:22 AM
  3. Need some parts for my 1995 Z 50
    By Jthomas7 in forum Bikes and Parts Wanted - All Makes
    Replies: 1
    Last Post: 10-19-2009, 04:33 PM
  4. 1995 kx 80 forks on 110
    By zbra09 in forum KLX110, DRZ110, TTR90
    Replies: 12
    Last Post: 10-21-2008, 10:21 PM
  5. Fs 1995 Cr 500
    By customizedcreations in forum CRF50/CRF70 Parts For Sale
    Replies: 0
    Last Post: 07-18-2006, 04:39 PM

Search tags for this page

1995 pw 80 2 stroke clutch looks fine but wont idle while in gear
,
1995 pw80 carb factory settings
,
1995 yamaha pw 80 clutch torque
,
1995 yamaha pw 80cc
,
99 yamaha pw80 wont crank after its warmed up
,

join spid pour piwi 80

,
perfect setting for 1995 pw80
,
pw80 cuts off when put in gear
,
pw80 going into gear hard
,

pw80 top speed without restrictions

,
rm 80 vs pw 80
,
yamahah peewee 80 running rich discuss
Click on a term to search for related topics.