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Thread: First time on the dragstrip!

  1. #41
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    Got the wheelie bars mounted this week. With the longer swingarm, the old upper mounting points didn't work. I wound up welding a couple 3/8" coupler nuts to the underside of the frame. I don't weld often; one looked good but on the other side I blew a hole in the frame tube. A buddy of mine with a lot more experience patched the hole with his tig. Should be good to go!

    Hoping to do some shakedown runs this Saturday.

  2. #42
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    Quote Originally Posted by patrino View Post
    Got the wheelie bars mounted this week. With the longer swingarm, the old upper mounting points didn't work. I wound up welding a couple 3/8" coupler nuts to the underside of the frame. I don't weld often; one looked good but on the other side I blew a hole in the frame tube. A buddy of mine with a lot more experience patched the hole with his tig. Should be good to go!

    Hoping to do some shakedown runs this Saturday.
    Sounds great! The wheelie bars should be good for about a .5 of a second. Plus it will help with your consistancy.👍
    My Motorcycles:
    21 Triumph Tiger 900 GT (coming to a town near you)
    16 Yamaha FJR1300 (Probably been to a town near you)
    82 1100e Drag Bike (needs race engine)
    81 1100e Street Bike (with race engine)
    79 1000e (all original)
    82 850g (all original)
    82 750e (parts Bike)
    80 KZ650f (needs restored)

  3. #43
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    Dec 2019
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    Progress last night ... did a handful of passes in the 10.1xxs, with a best of 10.150. The sixty-foot time for that run was 1.613. The wheelie bars definitely helped. If nothing else they let you think less about clutch control.

    The engine's running well, though I'm going to probably lean out the needles a clip, and the main jets a size, depending on what the plugs look like.

    The big challenge / unknown is chassis tuning. My friends / pit helpers say the frame's flexing a lot, like it's hinged in the middle (and that's what it feels like). The rear tire is lighting up during some passes, not in others. I played around a bit with tire pressure and wheelie bar height, but still thinking on what's working and what's not.

  4. #44
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    Jun 2013
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    Quote Originally Posted by patrino View Post
    Progress last night ... did a handful of passes in the 10.1xxs, with a best of 10.150. The sixty-foot time for that run was 1.613. The wheelie bars definitely helped. If nothing else they let you think less about clutch control.

    The engine's running well, though I'm going to probably lean out the needles a clip, and the main jets a size, depending on what the plugs look like.

    The big challenge / unknown is chassis tuning. My friends / pit helpers say the frame's flexing a lot, like it's hinged in the middle (and that's what it feels like). The rear tire is lighting up during some passes, not in others. I played around a bit with tire pressure and wheelie bar height, but still thinking on what's working and what's not.
    You are doing great! Way better than me, I am scared to launch decently with a stock wheelbase no bar bike. I am going out a week from Wednesday, hoping I do better. I have also lost 60+ pounds since last time I was out pre-Pandemic. Should be good for a couple tenths. And my leathers fit now. Actually, that was the whole reason for the diet. I was too cheap to buy bigger leathers

    09 Kaw C14 Rocket powered Barcalounger
    1983 GS1100e
    82\83 1100e Frankenbike
    1980 GS1260
    Previous 65 Suzuki 80 Scrambler, 76 KZ900, 02 GSF1200S, 81 GS1100e, 80 GS850G

  5. #45
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    I've just read the whole thread, and I didn't see where you mentioned what bike it is, or was. For some reason I'm under the impression it's an 1150. Whatever it is, 10.15 is damn impressive. What mph did it do?

    I've read that even if a bike has a slower E.T., if it reaches a higher mph, it means it's a more powerful engine, and would probably win in a longer race.

    Some pics of the entire bike would be nice. Are the wheelie bars removable? Could it still be street legal?
    1982 GS1100E V&H "SS" exhaust, APE pods, 1150 oil cooler, 140 speedo, 99.3 rear wheel HP, black engine, '83 red

    2016 XL883L Two-tone blue and white. Almost 42 hp! Status: destroyed, now owned by the insurance company. The hole in my memory starts an hour before the accident and ends 24 hours after.

  6. #46
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    A bunch of passes under 10.20 is fantastic!
    2@ \'78 GS1000

  7. #47
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    @Rob S. the bike started life as an 1150, but has a 1229 kit in it. The best time was at 132 mph. What still blows my mind is that my top speeds have been pretty consistent, even as the elapsed time drops (My best ETs of 10.755, 10.392, and 10.150 were all at 131-132 mph.) Intuitively if you're getting 'up to speed' more quickly (especially as the 60' times drop) you'd think you'd also get up to a higher top speed ... at least that's how my intuition goes.


    I'll get some more photos. Yes, the wheelie bars are removable: two 3/8" nuts at the bottom, two 3/8" screws at the top. Bike could be put back on the street, but would be very 'purposeful', with the total loss ignition, square tire, etc. Let's say that I'm not planning on riding it on the street! Per my earlier post, getting the wheelie bars 'tuned' is a big to-do. A friend is willing to loan me his GoPro. I figured I'd put it on the facing rearward, to get an idea of what the rear tire and the bars are doing.


    Thinking back on my many years road racing, if I did it over again (or if I pick it back up again), I would have run a video camera during practice ... not to post social media videos but as a training tool. I don't know about other folks but I can only take in so much information while I'm riding. Being able to truly 'replay' what happened, after the fact, would be helpful. Any suggestions on this front are appreciated.


    I pulled the plugs today and they look pretty good, so I might just hold on the jetting.


    Next step on the mechanical front (besides wheelie bar tuning) is a lockup clutch. I'm talking with @rapidray and he's getting me set up with a two-stage setup. After that I'll probably start heading to the bracket races on Wednesday nights (though I'll probably still do Friday/Saturday 1/4-miles, because they're fun!)


    I rode my Husky up to the bracket races last Wednesday night at PIR, to check it out. There were a half-dozen bikes there, from a stretched Hayabusa with nitrous, to a couple well-loved (and well-worn) SOHC Honda 750s.


    @bobroger, I hear you about launching a stock wheelbase bike without bars. I'm still getting comfortable launching a stretched bike with bars! What's your local track, SIR? (I see Enumclaw next to your name on the forum.)

  8. #48
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    A slider clutch, with a 1-2-3 auto cut trans would help a ton.....

    But it won't be street ridable anymore, and you need a tow scooter.
    Bob T.

    "That which you manifest is before you." -- Enzo
    "I always prefer to believe the best of everybody, it saves so much trouble." -- Rudyard Kipling
    "...for our existence to hold any value, it must end. To live meaningful lives, we must die and not return." -- Number Six

    '83 GS1100E ~ '01 TRIUMPH TT600 ~ '99 TRIUMPH TROPHY 900 ~ '67 HONDA CUB



  9. #49
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    Finally got my hands on some photos from my friend Seth, here's one:

    IMG_4655.jpg

  10. #50
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    Getting ready to go out:

    PXL_20210424_015557709.jpg

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