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97xr400r

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Posts posted by 97xr400r


  1. On 3/5/2020 at 1:26 PM, 350thumper said:

    Hi erry body. Looks like I'm gonna make a detour and start heading  the Trans America trail. So I gonna ride SD over to Vegas Friday  then Try to catch the trail from there first thing morning after catching some grub in Vegas . Hopefully get to check out some  Oregon dunes.. 

     

     

    wer u @?



  2. Saturday, October 5, 2019

    San Diego Hamfest 
    at Lakeside Rodeo Grounds

    https://www.google.com/maps/place/12584+Mapleview+St,+Lakeside,+CA+92040/
    www.SDHamfest.org
    Admission $5 per person
    (Children under 12 free if accompanied by a paying adult)
    Exhibit & Vendor Hall open 7 a.m. to 3 p.m.
    Presentations hourly from 8 a.m. to 3 p.m.
    Learn about Radio Frequency Interference (RFI), Ham Radio Satellites, Antennas, Summits On The Air (SOTA), and DMR radios. 
    Chat one-on-one with ARRL Southwestern Division Director Dick Norton, N6AA, and attend his group discussion on current issues facing ham radio. 


  3. Sorry your having troubles. Glad it didn't happen at an even more inconvenient time or place! Thanks for posting about this.

    Dang! I just looked up the specs on that bike, what a ripper! I couldn't find a compression ratio though. What fuel do you run?

    Always hard to tell in photos but it looks like the piston got just hot enough to start sticking to the cylinder wall. Aluminum gets into the top ring groove, cylinder pressure blasts past top ring and the problem snowballs...

    Some causes that come to mind...

    -As mentioned before detonation (old gas and an already close to lean tune?)

    -As mentioned before that piston crown is really clean looking. Close to lean tune?

    - Be sure the piston oil squirter is not clogged or receiving low oil pressure.

    - Possible hot spot on cylinder? How does the cooling jacket look in that area?

     


  4. Yeah, 650r!

    -Keep an eye on the right side footpeg mount, the stock bolts are not strong enough. They flex just enough to allow the frame to get rounded, bolt cyclic fatigues and... Snap.  Known issue. Not fun on a big ride.

    I had to grind the frame peg mount surface flat and perpendicular. Once the mounting surface was restored true I installed ARP bolts and proceeded to tighten them to OMFG spec. This fix has been holding up for years.

    - Also once your valve adjustment interval gets below 800 miles it's time for a valve upgrade. The stock intake valves are soft and sink into the seats. Another known big miles problem. I'm in the middle of addressing this issue... rebuilding the head on mine... Time for a little more compression and cam duration 🔥🌎🐖

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