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  1. T Bill

    1986 V65 oil pressure light staying on for a couple of miles

    Might be worth installing an oil pressure gauge temporarily. Messy, but I did that many years ago on my 850T after I found the passages in the rocker pivots packed with junk from the old timing chain tensioner. Once I felt confident I was getting decent pressure, I went back to the sender and light.
  2. T Bill

    Bitubo rebuilders?

    Sorry, I don't spend much time here. Todd who? I'm guessing it's the Creator of the forum, but don't see contact info prominently displayed anywhere.
  3. T Bill

    Bitubo rebuilders?

    I put Bitubo front shocks in my SP in 2011, and on the way back from the Ontario rally last week,I realized they are toast. Got a bit over 30k miles out of them. I remember hearing that they are rebuildable, does anyone know of someone who offers the service or maybe a kit so I can do it myself...
    • T Bill
    • Thread
    • front fork front shocks rebuildable
    • Replies: 3
    • Forum: Loop & Tonti
  4. T Bill

    Breather pressure

    I've learned the hard way over the years to fill oil only to the halfway point between the dipstick marks as John suggests. Same for SP and 850T. Filling higher works OK until I cruise at 70 or more, at which point it just ends up blowing it out the breather all over my rear wheel until it...
  5. T Bill

    De-linking SP brakes

    Actually just consulted the chart jr1967 suggested, and see that my front ratio is 25.67, rear is 20.48, values which fall pretty well into the suggested ranges. 20.5 sounds a little low, but the rear is operated by foot, through a linkage that may be giving some mechanical advantage of it's...
  6. T Bill

    De-linking SP brakes

    Followup report: Mods are done and the pads have had a couple hundred miles to wear in. New hoses I had made at Pirtek laid in perfectly (whew!). Both front and rear brakes work great. Turns out the rear caliper is an F09, with 48mm pistons, which I'm sure helps a lot with the 15mm stock rear...
  7. T Bill

    De-linking SP brakes

    jr1967, is it possible you left the proportioning valve in the line, further reducing pressure to the rear? The ratio of the piston areas says one would get 35% less pressure at the caliper for a given force on the pedal with the 15mm master. Seems like that wouldn't be enough to produce the...
  8. T Bill

    De-linking SP brakes

    Plan for now is to try the existing rear MC as-is. If it turns out I don't like it, where did you find your Duc unit on this side of pond? Thanks, Bill
  9. T Bill

    De-linking SP brakes

    Thanks guys, I think I'll move ahead with this. I had sort of forgotten about that ratio valve or whatever it is that splits the feed to the front and rear calipers. Can I just eliminate that and send the rear master line straight to the caliper? This should end up simplifying the plumbing a bit.
  10. T Bill

    De-linking SP brakes

    I was just buying brake caliper and m/c rebuild parts for my '83 SP NT, and got to thinking I'd always wished the brakes weren't linked. Makes me really uncomfortable when I find myself on dirt roads. Maybe I should just do it if I'm gonna get my fingers in the fluid. I would prefer not to argue...
    • T Bill
    • Thread
    • brakes de-link delink tonti un-link unlink
    • Replies: 10
    • Forum: Loop & Tonti
  11. T Bill

    Ignition system for a 82 sp1000

    I had a DYNA III in my 850T for a while, but got disenchanted when I had trouble keeping the battery charged. The DYNA III doesn't allow one to set the dwell, and keeps the coils energized most of the time, wasting power and heating the coils unnecessarily. Then it stranded me in Alma WI one...
  12. T Bill

    Are my bevel gears toast?

    Did you say the u-joint just fell out of the carrier bearing when you pulled it apart? If so, that's not OK. The u-joint is supposed to be a press-fit into the inner race of the bearing. This loose condition usually shows up as a vibration felt through the right footpeg at low speeds when the...
  13. T Bill

    Speedo ratio on '97 Cal

    Apparently the de-facto standard drive ratio is or was 1610 turns per mile. Not sure how much this helps, but I did the test suggested by Palo Alto Speedo on their web page (mark 52.8 ft on ground and push bike over it, counting cable turns), thinking I'd send the one on my "83 SP to them. I got...
  14. T Bill

    850-T Project build

    Also haven't been watching, and just remembered to change my email address here to something current. Bike looks great. On subject of grounds, I've never been a fan of using the frame as electrical return, especially for the stuff on the front end. Have run a 14 gauge ground wire out to the...
  15. T Bill

    850-T Project build

    Um, have you actually worked out how the rearsets are going to go on? I looked into that early on in the fixing of my 850T and found that none of the off-the-shelf units will work due to the control arrangement on the T. Guzzi arranged it with axles that go all the way from one side to the other...
  16. T Bill

    C5 ignition questions

    So it sounds like the C5 dynamically adjusts the dwell or ON time, of the coils in addition to advance, based on RPM. The idea of electronic control of advance is tantalizing, since I only recently read the section of Guzziology on timing advance and springs (yuck). My SP is running better...
  17. T Bill

    Bought back my old 850t!!

    Started a C5 Questions thread, maybe we should continue discussion there....
  18. T Bill

    C5 ignition questions

    Looking at website for C5 ignition mentioned in "Bought back My Old 850T" thread: http://www.c5ignitions.com/motorcycle-ignitions.html Have some questions on what gets replaced. Maybe C5Paul is listening. Does it come with special coil(s) to replace stock Marellis? Is the standard advance...
  19. T Bill

    Bought back my old 850t!!

    My '74 850T has chrome bores and they are still just fine. If yours turn out to be chrome, leave them alone unless they actually go bad. This isn't the sort of thing that fails catastrophically and tosses you on the pavement. The main thing is not to let it sit around long enough to build...
  20. T Bill

    Refinish Bub exhausts?

    Thanks Todd. Looks like there are several places fairly close I can take them to. Only one has posted pics of their work. Will call a few and see what gives. Sounds like a powder coat that then gets baked?
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