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beison8000

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About beison8000

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    TT Newbie

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    Colorado
  1. beison8000

    Starting a 1984 XR350R rebuilt

    Been a little while since I posted. I mostly finished everything on the rebuild. We welded a kickstand on, only to have it fall off and then do a much better job (with a reinforcing bolt inside the frame.) A new chain and sprocket, stripped plastics (still ugly but they're good for now), dual sport light kit and plating, a new seat cover, and a few other bits and everything is mostly good to go. I have ordered a Trail Tech Vapor speedometer/gauge cluster that will be arriving soon. The engine turns over on the first or second kick, and it runs quite strongly and responsively, however it is running quite hot. A trip ~20 miles on tarmac at speeds of 50-80mph followed by a few stop lights resulted in a infrared thermometer temperature reading of ~375F at the head near the headers, lower 300's at the back of the head, and mid 200's in the bottom end. Do these readings seem hot? I'm currently jetted at 105 primary, 100 secondary, and 28 pilot. I believe this is a little leaner than stock, but it is dead on for what the manual recommends at my elevation (5300ft.) The engine has been painted by the previous owner, so this could be affecting the head dissipation... Any thoughts here would be appreciated. Also if I forget to turn off the gas, the carbs leak a small amount of gas. Not enough to get the pavement wet below the bike, but enough to keep the block wet with gas... I pulled the carb bowls and looked at the float needles and everything seems to seal well, so I don't know what could be causing the issue.
  2. beison8000

    Jetting question for a 1984 XR350r

    Well I took the temp of the block after a little ride and it was at 260F
  3. beison8000

    Jetting question for a 1984 XR350r

    Well it didn't run badly when I had it at stock... But it was definitely hot. There are some guys on Youtube that have it jetted to 130 on the primary, 48 on the pilot, and 110 on secondary, and they said they are in Denver. When I tried this jetting the bike ran like absolute garbage so I'll switch back to what worked before and just change the oil regularly unless there is some other magic high performance, low heat combination for 5000-8000 ft...
  4. beison8000

    Jetting question for a 1984 XR350r

    Thanks for the info Lombardim, this is a good datapoint for me to use in the ultimate tuning understanding of the bike.
  5. So I posted this in the technical forum, but no response... Perhaps someone here knows something? Thanks for any help: Greetings all, I'm in the process of getting a new to me 1984 Honda xr350r to run right. I've done a bunch of reading about these dual carb'd beasts and hopefully someone with experience can shed some light: I live at about 5400ft elevation (Boulder, CO) and most of my riding will be done between 5000-10000ft elevation. Likely more like 5300-9000. As is well known, these bikes were jetted quite lean from the factory with a #28 pilot jet and a #110 primary jet and a #105 secondary jet (in the second carb). My bike has been rejetted as per the factory specified recommendations from the service manual to accomidate this new altitude and now it's got #28 pilot, #105 primary and #100 secondary jets. I started it up and it ran pretty well with this jetting, however the general wisdom on this model is that it will run extremely hot at the factory recommended jetting. Now the conventional wisdom seems to be that most owners rejet this bike to a #48 pilot, a #130 primary, and a #110 secondary. I bought these new jets and put them into the bike, however when I started it up it was very hard to start (10th/20th kick start on new jetting vs 2nd-3rd kick start on the leaner jetting). The bike also now runs quite poorly with hesitation and sputtering and an overall sense of being too rich. This was all done at 5300ft. My question is, does anyone here have experience jetting these dual carb xr350's for the colorado rockies? If so, and you got it to run well, what were the jets you ended up using? I'm sure there is a sweet spot between performance and heat management and I'm hoping to be able to find it. Thanks for any help!
  6. Greetings all, I'm in the process of getting a new to me 1984 Honda xr350r to run right. I've done a bunch of reading about these dual carb'd beasts and hopefully someone with experience can shed some light: I live at about 5400ft elevation (Boulder, CO) and most of my riding will be done between 5000-10000ft elevation. Likely more like 5300-9000. As is well known, these bikes were jetted quite lean from the factory with a #28 pilot jet and a #110 primary jet and a #105 secondary jet (in the second carb). My bike has been rejetted as per the factory specified recommendations from the service manual to accomidate this new altitude and now it's got #28 pilot, #105 primary and #100 secondary jets. I started it up and it ran pretty well with this jetting, however the general wisdom on this model is that it will run extremely hot at the factory recommended jetting. Now the conventional wisdom seems to be that most owners rejet this bike to a #48 pilot, a #130 primary, and a #110 secondary. I bought these new jets and put them into the bike, however when I started it up it was very hard to start (10th/20th kick start on new jetting vs 2nd-3rd kick start on the leaner jetting). The bike also now runs quite poorly with hesitation and sputtering and an overall sense of being too rich. This was all done at 5300ft. My question is, does anyone here have experience jetting these dual carb xr350's for the colorado rockies? If so, and you got it to run well, what were the jets you ended up using? I'm sure there is a sweet spot between performance and heat management and I'm hoping to be able to find it. Thanks for any help!
  7. beison8000

    Starting a 1984 XR350R rebuilt

    got an air screw and the bike is running well. I ordered some new jets to put the idle jet at 48, the primary at 130, and the secondary and 105. Hopefully this will keep everything running nice and cool. I started sanding off the paint on the plastics. I will never spray paint anything again... stripping paint is terrible. I also ordered a new seat cover--two toned black on top and red on the sides. So the overall color I think I'm going for is the black frame/engine, red plastics and tank, and black and red seat. Hopefully it will turn out well.
  8. beison8000

    Starting a 1984 XR350R rebuilt

    So carbs came apart nicely and got cleaned and put back together. Big problem that I noticed while in here: The previous owner lost the air screw! I looked on ebay and other parts houses and nobody seems to have any spares. Does anyone have any tips on what I could use as a replacement aside from going to a junk yard and digging?
  9. beison8000

    Starting a 1984 XR350R rebuilt

    Hey hey flash red's a great color--just not sure the color combo is right for my bike :-P Anyway, good news! The clutch bracket came in and I DONT need to unstick the clutch! Also I got the bike's first inaugural ride in my possession in. Still needs some work, but it moved and clicked through the gears. (The tire was flat and it had no headset so I just went strait about 100 feet and back). The new headset is pressed and greased and sealed up now, and now onto new projects. Flipping the choke down causes the bike to die, so I think there's a carb problem and I will dive into the dual carburetor (the 83 and 84 xr350r's come with dual carbs) to clean things out and see if I can't get it running better. I'm also going to ride the bike at between 5000-10000ft altitude, so I will check to see what the jetting is at. In case I need to rejet, does anyone know where I could get new jets for a bike of this vintage?
  10. beison8000

    Starting a 1984 XR350R rebuilt

    Ha! I bookmarked this thread last week! Definitely good advice on stripping the paint and I'm planning on doing it for sure. Not sure if I'm a fan of the Flash Red like everyone else... looks a bit clowny for my taste. Not sure what color scheme I'll go with actually--the PO gave the frame and block a pretty good black paint job, so maybe I'll go black and flash red? Not sure really--any ideas (and pics if you got em!) would be most appreciated~
  11. beison8000

    Starting a 1984 XR350R rebuilt

    Thanks for the info guys! I'm still sourcing the bits and pieces I need to get it moving. I think I don't need to do much work to the engine because it starts up on the 3rd-4th kick at 25 degrees F out. I have a clutch bracket in the mail and once that's in I'll post back on progress with desticking the clutch.
  12. beison8000

    Starting a 1984 XR350R rebuilt

    Hey I don't suppose if anyone has spare front chain sliders? (part number 52155-KF0-005) Nobody seems to make the part anymore. Thanks!
  13. beison8000

    1983 Honda XR 350 R

    I have an '84 I'm currently getting going. It will be my first dirt bike. What did you find lacking in the 84/83 vs the 85 you currently own? From my understanding, the dual carbs are annoying, but once they're dialed in it's not too much of a headache. The oil in the wet sump is a drag and makes the bike hot, but can't you just jet the carbs a bit rich and not have an issue?
  14. beison8000

    1984 XR350 Restoration Start

    Oh and I'm pretty sure I found those circle header pieces on bikebandit. They are the parts that effectively bolt the header to the block right? Oh and I'm pretty sure I found those circle header pieces on bikebandit. They are the parts that effectively bolt the header to the block right?
  15. beison8000

    1984 XR350 Restoration Start

    Ha yeah it is ugly for sure. It's an 84. The only parts I'm currently (might change as I dig deeper...) missing are matching side plastics, a speedometer and speedo bracket, and a chain slider (the one right behind the front sprocket.) I did just order the shop manual too, so if you need any scans of anything let me know and I can send them over.
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