callison Posted January 26, 2005 Share Posted January 26, 2005 Rennsport exhaust article Hey Dave! This is for you man. I draw no conclusions except that Bos no longer makes one for Guzzi's anymore and Rennsport is long, long gone... Link to comment Share on other sites More sharing options...
Guest Steve_W Posted January 26, 2005 Share Posted January 26, 2005 AAAIIIIIEEEEEE!!!! Oh, sorry. Just having flashbacks... I bought a set of Mikuni flat-slide carbs for my '85 LeMans from Rennsport a bunch of years ago. They came jetted "safely rich" according to Rennsport's owner/sole employee, whose name I've fortunately committed to the mental bit bucket years ago. No kidding, they were rich; the thing would idle nicely without the choke within a couple of seconds after starting it cold. Gas mileage dropped from high 40s (miles per U.S. gallon) to mid-30s. I knew enough to change the main jets but nothing more, which didn't help, and got no further help from Rennsport. Eventually I managed to make the LeMans not run, which is no small feat apparently. I sold the LeMans for a song, to my great sorrow. A non-running motorcycle is less than useless; it not only didn't run but I had to look at it in the garage, which added to the torture. I loved that LeMans too, before I screwed it up. It just had a few idiosyncracies, all of which centered on those damned Dell'Orto carburetors. Ah hates carburetors! Well, not all carburetors, just ones I can't make work, and those 40mm Dell'Ortos drove me crazy. There, I've said it. Thanks for letting me vent. Someday I'll have another Guzzi... Edit: The Mikunis didn't even solve the problem I was trying to fix, which was the heavy throttle spring/half-turn throttle combination. I never understood why the throttle springs had to be so heavy and yet it took 180-degrees to go from closed to full-open throttle. My Japanese bikes, every one of them, had an easier throttle pull AND a quarter-turn throttle. If Honda, Kawasaki, and Yamaha could do it, why the hell couldn't Moto Guzzi/Dell'Orto? Grumble, grumble... Anyway, the Mikunis traded the heavy throttle springs for a vacuum sticking problem, whereby the slides wouldn't open under trailing throttle without a gorilla grip and a lot of effort. A different problem, but just as annoying. Sorry, venting again... I've heard that the Keihin FCRs solve these all problems, but at a cost: USD 1500 for a kit from Sudco for the carb Sport 1100. Oh well... Link to comment Share on other sites More sharing options...
dlaing Posted January 26, 2005 Share Posted January 26, 2005 Very nice design for power's sake. What I don't like is what it'll do to oil changes and luggage space. What I need is a QuatD like system that dynos better than stock across the board. Enzo is on to something with the Cobra system that I suspect is LOUD and may get in the way of oil changes and lower curb hopping clearance. Link to comment Share on other sites More sharing options...
Paul Minnaert Posted January 26, 2005 Share Posted January 26, 2005 The guy from rennsport ( can't remember his name either)has lived some years in the netherlands. In that time I had an exaust made for the daytona. I went to misano motors, where also rennsport was, because they had a dynoyet setup. The first thing they said was that I copied there exaust, but mine wasn't going to work. That was proved wrong on the dynoyet:-) The rennsport pipes were known for cracking, thin pipe that didn't resist vibration. The same layout can be had from deas motec. He disapeard when he owed a lot of people money, and we never heard from him again. the mikuni's: Link to comment Share on other sites More sharing options...
jrt Posted January 26, 2005 Share Posted January 26, 2005 I came awful close to buying a bunch of stuff from 'Rennsport' when he was in Ojai, CA. I'm glad I didn't. I still have an old price list on my computer if anyone wants a copy (no idea why you would....I just can't throw anything away). Anyhoo, Steve, the fix to the throttle pull was just to cut the springs in half, stretch them out a bit, and you're good to go. You probably didn't want to hear that..... I really like Dell Orto carbs, but they're the only ones I have ever used...except for Amal and maybe that explains why I like Dell Oroto's. Jason Link to comment Share on other sites More sharing options...
Guest Steve_W Posted January 27, 2005 Share Posted January 27, 2005 Anyhoo, Steve, the fix to the throttle pull was just to cut the springs in half, stretch them out a bit, and you're good to go. You probably didn't want to hear that..... Yes, so I found out. I put the bike in the MGNOC newsletter classifieds and sold it pretty quickly. A month later, the then-tech director began a new series on setting up your Moto Guzzi properly. The bike he used as an example was, naturally, a LeMans IV. Great. Now you tell me. Link to comment Share on other sites More sharing options...
jrt Posted January 27, 2005 Share Posted January 27, 2005 Sorry. J Link to comment Share on other sites More sharing options...
Paul Minnaert Posted January 31, 2005 Share Posted January 31, 2005 his name is/was Charles Rice Link to comment Share on other sites More sharing options...
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