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William MartinParticipant
To the best of my eyeball & calliper accuracy, it looks like 6mm. This being the old/original model Sniper unit, doubt if the grid has changed with newer units.
William MartinParticipantYou might want to check out the SN & JN series of portable hones, not quite so expensive. Not cheap either, but maybe half the cost. I bought an SN-75 model some 20 years ago, for 100cc cast iron cylinders, it works great. Just need a big 1/2 inch drill to turn it.
William MartinParticipantI can tell you it is not the same as the TM shift arm, I’ve seen them side-by-side.
July 19, 2017 at 3:34 pm in reply to: Project Paradimes Shifter: Making Karting Dreams Come True #83788William MartinParticipantCan you post pictures of the caliper bores? Let’s see if they can be saved…or just need to be replaced. Stuff that sits a long time with brake fluid in it doesn’t do too well…
William MartinParticipantA mere $401 in my 1997 catalog… ugh. Glad you found it!
July 17, 2017 at 12:27 pm in reply to: Project Paradimes Shifter: Making Karting Dreams Come True #83703William MartinParticipantDo the brakes work? If it’s been sitting for a long time, as it looks, the best thing you can do is tear down the entire chassis and clean/inspect everything as you put it back together. New seals all around, engine and brakes would be a good start!
William MartinParticipantWhat’s the bore size? Somewhere I think I have a Sunnen catalogue…years old, but still ok for this I think.
-bill
William MartinParticipantThis all depends on how experienced you are in general with small engines. If you are used to working on high performance stuff, the only thing I would suggest is that you take the crank/rod assembly to a shop that can do the rebuild, or just buy that assembly new from a Honda bike shop. It’s kind of tricky stuff, aligning the two crank halves and pressing together…buy some experience, you won’t regret it. The rest you should be able to handle. You will need to do a thorough cleaning/flushing of the crankcase to get the various other bits of metal out that may be hiding in there some place. If you don’t have the Honda cr125 manual, get one and read it before you dive into this! Probably you will want to replace crank main bearings while it is apart, much cheaper than after one lets go…
William MartinParticipantHmm, well, change happens. Usually somebody’s ox gets gored in the process, hope Tom can pull off a good compromise when the time comes.
William MartinParticipantWell, I sure don’t know, but that would be about the same as shooting off both feet…unless the supply of Honda engines became zero, that sounds like a silly idea.
William MartinParticipantYou would be BOSS on every left turn… :-)
William MartinParticipantWhat colour are the wires that appear to be cut? Almost no one connects the kill switch, it’s possible that they are the ones not connected…otherwise, hunt for dirty connector pins/sockets, wiggle one wire at a time and see if it cuts out…that’s your best clue without real test equipment. Check all ground connections, coil to engine case and chassis…sometimes a dirty ground is just perverse! You can find wire colors in the Honda manuals, maybe on line, haven’t looked though. Sometimes a stator coil connection vibrates ‘loose”, still there but intermittent. Some disassembly required!
William MartinParticipantI have one from about that vintage, for parts you might try Russell Karting, (russellkarting.com) they are the Parolin contact for USA. There isn’t anything unique about non-floating brake rotors, the mounting pattern is kind of standard, just measure the diameter and thickness of the rotor and match that with the new one. Now someone will point out a pathological case! Plenty of places to find bolt-on rotor guards, just realize that nothing is bullet proof, if you hit it with a big enough bullet!
William MartinParticipantThat’s really neat!
William MartinParticipantInteresting thought, I expect it is off the beaten path enough that you just have to try it & see. Keep the carb extra-rich until you know how much torque you are getting from the FY pipe. I expect it is a wide, as in non-peaky power band, which is good for an experiment. Not as likely to melt a piston as a peaky pipe! If you have an egt gage on your HPV, it will tell a lot about how to tune for that pipe.
Best of Luck,
Bill
William MartinParticipantI seem to remember some kind of chart/plate that goes with the Sniper Laser system that measures caster angle. It gets attached to the steering shaft if I remember it correctly. Somewhere on the center line of the chassis at any rate…
William MartinParticipantI think the best driving style for anyone depends a lot on the physical talents they have. If you have Schumacher-like talent, you can likely go faster by being slightly “over the edge”, which is what I think you were describing. For the rest of us, backing off a bit will pay better dividends! Not to mention less crashes…
Bill M
William MartinParticipantDid the seat fit you well? If it’s too loose a fit, all manner of discomfort can happen…
William MartinParticipantThat’s part of what makes your engine “mod”, as opposed to stock. It’s there to keep the extra compression your engine has from blowing past the stock head gasket. I would use Viton for that o-ring, it gets hot where it is located.
William MartinParticipantHas it worked before? I ask only because it isn’t the correct CDI for your engine… how about trying a stock Honda box, to isolate the problem between the Honda stator and the aftermarket CDI box?
Bill M
William MartinParticipantI suspect it’s the clutch…you can’t make money as a “school” if the parts have to be replaced too frequently…and I don’t see a big advantage to the technique. Just hammer the gas a tiny bit earlier, and I think it works out about the same. Unless you have an engine that loves to stall!
William MartinParticipantIn California, yes, 55mph while towing. Try not to get run over by the BIG trailers going 70+! No idea about the choice of tow vehicle, it does seem kind of wimpy for towing though.
William MartinParticipantDoes the knurled ring turn?
William MartinParticipantIt was about .7 seconds, but that was just between old-style & newest TopKart plastic. Gotta try a Jim Hall style sucker fan someday! :-) Where do you put that on a kart?
William MartinParticipant“One very fast HPV 4, complete package, mount, carb, filter and box, pipe, clutch (need a new driver, all the teeth are gone )”
Dude must be really old.. :-)
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