This opens the petcock when the engine is turning over.

I'm hoping there is someone out there who understands the unreliable carburetor for this model year. 6. Not a good combination unless you want all power between 45-60 mph, great in that range but too slow up to 45 mph compared to the 5/6 sliders combo. In 1988 through 1991, both regular and Z versions were sold, except for 1990 when just the Z was available. Opting for the Z trim over the regular Riva 180 got you a two-tone paint job with pin-striping, color matched rims, a digital clock in the dash, a ‘plush’ two step seat and the option to add a tinted windscreen. The site may not work properly if you don't, If you do not update your browser, we suggest you visit, Press J to jump to the feed. 180, 180cc, 1983, 80's, awesome, BCV, belt, bi metal control valve, Buzz in the valley, carb, carb swap, carburetor, cheap, choke, cub, eighties, fun, genuine scooter, genuine scooter company, hard to start, kymco, manual, mikuni, passport, rally, rh50, riva, riva scooter, riva yamaha, roughhouse, scoot, scooter, scootering, scooterist, scooters, sidecar, stella, sym, symba, variator, vespa, won't start, wowow, xc180, yamaha, Yamaha riva, Yamaha riva 180. Until this problem is fixed, these Riva’s are difficult or impossible to start. Every test requires excessive time for disassembly and reassembly of half the bike. Of interest, Yamaha has stated this recall applies to 3506 vehicles, so we know that's how many Riva 200's were sold in the USA during those 2 years. 1. Yamaha sold quite a few neat accessories for their Riva 180/200 scooters including rear cases, a ‘streamliner’ windscreen and an unusual tennis racquet holder rack. I am finding my garbage GY6 chinese scooter is more reliable than this Yamaha, and that bike sets a very low bar. That means that sales were roughly 1750 units/year. Very nice. The Riva 180 was quite fast for its size with a top speed in excess of 70mph. Finally have better pics and new vacuum lines. Manifold needs a vacuum line to the petcock. I have made a half dozen attempts at different float levels and have put it at extreme high and low heights and all heights result in fuel flooding the carb and contaminating the fuel. Yamaha withdrew the Riva 180 from our shore after 1985 but they returned for the 1987 model year with an improved Riva 200 (XC200) capable of 75mph. The Riva 180 was a powerful 4-stroke scooter with a respectable top speed of 70-75 mph.

Get rid of BCV and the other solenoids. The hose line that you said just cap or leave it open,only has one option. Tools required for roller/slider change (same for belt change): this is only a performance comparison test. The Riva 200’s aren’t affected by this problem as they use a different auto-choke system. The aftermarket carburetor creates instant throttle response and much greater torque/horsepower, uphill speeds are the best i have found so far with this combination. Ridges in the carb body prevent use of a normal carb float level ruler and I cannot find a repair manual for this model. Connect this nipple on the intake manifold to a decent petcock. Ok, so all of this worked except I feel you may have left something important out. Yamaha continues to use this name today with a 125cc model.

Things I have not properly done: *set float level - doesn't appear feasible. Max downhill speed was 67mph but was a fight to get to. It’s still there, or you could swap it out to a manual flow petcock. Carburetor shops are unwilling to work on a carb without billing it as a full rebuild at +$200 which is more than the cost for a brand new carburetor and unnecessary as I've already done the work myself.
https://plus.google.com/u/0/communities/106321129258849618290. get some Berrymans B12 spray carb cleaner and get a bunch of it in there, it will break down the gum/varnish from the gas.

Yes, the 17x12mm fit perfectly, stock roller weight is 6 grams (not a common size, but you can find them on the internet). Wiring You need to sign up for Yahoo to access their group but they have complied an impressive collection of information that makes sign up worthwhile. Riva 180's are like carburetor hardmode. ( Log Out /  With practice the engine can be removed in less than 15 minutes. 2.

Checkout the brochure scans at the bottom of this page for a look at the Deluxe Riva 180. Yahoo! Adam, do you have any info on Vbelt replacements for the ’83 rivas?

So one vacuum line and the fuel line.

You can use this to get a rough idea of how many might be in existence for all years, but keep in mind that scooter sales dropped off quite a bit by '89 and stayed low for over a decade. Ok.


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