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GaryZ

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Everything posted by GaryZ

  1. GaryZ
    As I stated, my thinking is to separate the left and right cylinders, the same as V-Boost, (similar to a dual plane intake manifold on a V8 ) only two cylinders are fed by one primary throat. Mounting a Q-jet is likely less expensive where I live, especially since I know a little about the beast, and I have parts to rebuild a used carb. And V-Boost would require the same type of mods to the Venture for space under the fake gas tank, and V-Boost needs electronics. Syncing it is the same as any Q-Jet. There are air horn adjustments on the front of the primaries that can be monitored by vacuum ports on each side of the custom manifold. What I do not know is; Will the QuadraJet idle/low speed circuit feed the Venture engine (after fine tuning) or will it simply flood it with fuel?
  2. GaryZ
    I just measured the primaries of a QuadraJet carb = 34mm My latest mad-max thinking is a split intake manifold where one primary and one secondary feeds the left cylinders and the other side feeds the right. Each cylinder is drawing through a 34mm hole at moderate throttle and the secondary will deliver as much as needed on demand. The idle circuit is adjustable. Why would this V4 offer unusable vacuum vs a V6 with a Q-Jet? (My 1985 Astro had a 4.3V6 and Q-Jet).
  3. GaryZ
    OK, the computer is looking for current to tell it the headlights are "on". How about routing the original headlight power to the driving lights and let them be the "load". Now a relay can be used for low beam and another for high beam.
  4. GaryZ
    I am not an electronics guru, but, I have an idea; I am using a 12V relay (Radio Shack) to switch a stereo power amplifier in my van. If the original headlight circuit is used to power the dash lights and energize a relay, the computer would have its signal and the relay could put serious power to the headlight.
  5. GaryZ
    My 1985 VR headlight/dashlights failed during an afternoon ride and nearly left me in the dark (literally!). I managed to get home running the flashers. Next day I found the wire from the headlight fuse had burned through . . . It was a couple of inches from the fuse panel. A splice repaired the circuit, however, it looks like this was not the first repair. I am thinking the headlight wiring may be too small and I may rewire with heavier gauge stuff.
  6. GaryZ
    You may have found your problem. If not, I will share a little of my experience; Symptom of leaking diaphragms: Idles and runs ok at lower RPM, will not run above ??? RPM (4k on Honda twin) The diaphragms of CV carbs control fuel and air flow at speed. The diaphragm lifts a slide in the carb to allow more air in. The bottom of the slide has the main metering rod that lifts out of the main jet to allow more fuel. A broken diaphragm will not lift the cylinder. Idle and low RPM are unaffected, as RPM increases, one or more pistons do not get an increase in air/fuel and drag down the engine. Replace leaky diaphragms, they do not work right when patched. Symptom of bad or "turned" gas: Bad gas occurs after the fuel has sit in the tank for a couple of months (or, like me, you may get a tankful right out of the pump!). Bad gas is a very big problem in the last couple of years. Bad gas clogs the idle/low speed circuits. The result is a bike that is hard to start, it has lumpy/poor idle and blubbers at light throttle. I have successfully cleaned a partly blocked low speed circuit (KZ1000) by removing the air horn screw and shot carb cleaner into the hole. Remember to turn the screw in until it lightly bottoms and count the turns before removing it. On my ZX11D7 I added about 4 ounces of Sea Foam to around half of a tank, rode the bike for 10 miles to mix the fuel and Foam, and let it sit overnight. Fixed!
  7. GaryZ
    I cut 5 inches off of my stock windshield. It looks really good and I can see over it at night (big improvement). My problem is now there is quite a bit of wind turbulence (noise) on the top of my helmet. I am 6'2" with a 35 inch inseam. I have a double-bubble on my ZX11D7 and it really reduced wind noise. Does anyone make a double-bubble style windshield for the Gen I VR?
  8. GaryZ
    Last year I was forced to remove and clean the carbs on my ZX11D7 after a tank of really bad gas had sat for a week. The symptom was very poor idle and blubbering at light throttle. One, possibly two, of the idle circuits were blocked. This past week it started to go bad again. This time a slightly less severe problem of rough running at idle or light throttle. I successfully cleared the idle circuits by adding about 4 ounces of Sea Foam to a 2/3rd tank of fuel. I rode about 10 miles to get the tank mixed, and parked it overnight. The next morning all was good!
  9. GaryZ
    Still have the floorboards and rear bumper for sale . . .
  10. GaryZ
    Here are a couple of pictures showing the general size of my 1985 VR front discs; Looks like 298 mm is correct for my bike.
  11. GaryZ
    Thanks for the comments on the chart. I updated the top of the chart to reflect the years of production. However, some of the data may have changed during those production years. Most of the info comes out of the free service manuals available on this forum. The HP and torque figures are from research of magazine reviews online. Yes, the MKI is listed as having 298 mm front rotors in the "8385servicemanual.pdf" I would tend to agree that the MKI is probably faster in stock form due to the weight difference. Notice the listed cylinder pressure. This suggests to me that the 2nd Gen has very different cams vs the MKI and MKII.
  12. GaryZ
    Here is a comparo chart that I put together from online service manuals;
  13. GaryZ
    I found this design online. It will be expanded for 4 carbs with "T"s, but, it works on my Venture, Ninja, and KZ1000 like it is. Check/adjust two cylinders at a time then recheck. The accumulators (small tanks made from PVC) dampen the vacuum pulses as well as the motor oil used in the clear tubing. Valves at the top of the accumulators allow syncing of the tool.
  14. GaryZ
    Excellent info, thanks Squeeze. I bought Vmax cams on ebay and I can compare them to the cams in the 1987 VR engine where they are going to reside.
  15. GaryZ
    Thank You! I was hoping to answer a few questions about the differences in a Venture vs Vmax cam. Instead, I am confused at how much they are alike. The difference seems to be in the springs and the valve size . . . ? Vmax VMX12N Venture XVZ12TK cylinder bore 75.07 ~ 76.02 mm comp. ratio 10.5:1 10.5:1 cylinder pressure 206 psi 171 psi camshaft intake A (lift) 36.25 ~ 36.35 mm 36.25 ~ 36.35 mm intake B 28.02 ~ 28.12 mm 28.18 ~ 28.28 mm exhaust A (lift) 36.25 ~ 36.35 mm 36.25 ~ 36.35 mm exhaust B 28.02 ~ 28.12 mm 28.18 ~ 28.28 mm intake valves head diameter 30.4 ~ 30.6 mm 28.9 ~ 29.1 mm stem outside dia. 5.475 ~ 5.490 mm 5.975 ~ 5.990 mm guide inside dia. 5.500 ~ 5.512 mm 6.00 ~ 6.012 mm exhaust valves head diameter 24.9 ~ 25.1 mm 23.9 ~ 24.1 mm stem outside dia. 5.460 ~ 5.475 mm 5.560 ~ 5.975 mm guide inside dia. 5.500 ~ 5.512 mm 6.00 ~ 6.012 mm inner valve spring free length 37.45 ~ 39.65 mm 35.3 ~ 37.3 mm closed length 31.8 mm 31.8 mm comp. pressure 13.9 ~ 16.3 lb. 10.08 ~ 11.84 lb. outer valve spring free length 38.90 ~ 41.10 mm 37.25 ~ 39.45 mm closed length 33.8 mm 33.8 mm comp. pressure 29.3 ~ 34.6 lb. 22.27 ~ 26.24 lb.
  16. GaryZ
    I found Vmax cams on ebay and they should be on the way. My plan is to install them in a 1987 VR 1300 engine with 41,000 miles on it, and stuff it in my 1985 VR. I will let ya'll know how it works . . . Thanks for all the info!
  17. GaryZ
    The specs that I am looking for are . . . Cam Dimensions Intake "A" Intake "B" Exhaust "A" Exhaust "B" Thanks!
  18. GaryZ
    Thanks!
  19. GaryZ
    I downloaded the 1st Gen Service Manual (8385servicemanual.pdf) and found the cam specs, page 403, missing. Does anyone know why this page is corrupt? Can someone send me this page?
  20. GaryZ
    I posted here after I looked for an area to post items For Sale and could not/did not see it. Give me a hint where I will find the classifieds . . . Opps! There it is in the top menu. Didn't look there.
  21. GaryZ
    Parts For Sale 1985 VR Front Bumper - very good condition - SOLD 1985 VR Rear Bumper & Hitch - pitted chrome on bumper - $200 http://i123.photobucket.com/albums/o318/GaryZ_photos/bumper09b.jpg 1985 Driver Floorboards with Controls - very good condition - $250 http://i123.photobucket.com/albums/o318/GaryZ_photos/pix037b.jpg The above parts are also listed on Craigslist in Oklahoma City
  22. GaryZ
    This very strange to me. My '85 VR starts into the "sweet spot" just under 3k RPM and is ultra smooth at 4k. My guess is you are running on three cylinders. Try the water trick . . . Start your bike cold and run for a couple minutes. Spray water on the exhaust pipes at the heads. If one of the four does not steam, it is not working.
  23. GaryZ
    $2.11 per gallon one mile from my house . . .
  24. GaryZ
    My '85 has the same whine. It is only noticed when riding without a helmet . . .
  25. GaryZ
    Why are the 1st gen driver backrests not the center post style?
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