When I am riding in a stiff crosswind, right quartering usually, the bike gags, chokes and today it quit twice. But when I turn downwind or a rear quartering crosswind, the bike runs like new. What is going on here?
Ive not had it happen on a TW, but some bikes will either cavitate or even "supercharge" at the snorkel entrance to the airbox if a crosswind is srong enough. Those can lead to a temporary lean or rich condition.
Since yours is occurring when the wind is quartering on the snorkel side this could be one cause.
Thanks for your response. I read an article a few years ago in MC Consumer about the wind creating a low pressure area and pulling the air back from the carb. If it is cavitating, is there some way to deflect this or something?
The same sorta thing but different can occur through the carb vents, as well. Either would be in the "goofy" category with the stock setup, but possible.
Is there a way that I can shield this or something? The 200 is my horse. When I am trying to control a bunch of cattle, they can outrun me when the bike starts acting up. In no wind conditions, it runs like new.
yeah, it happened again this morning when I was coming back into town from the ranch. Again, a right quartering wind, once I turned onto the county road and angled away from the wind of about 20 or 25 mph, it ran fine. I am going to try and figure out some way to shield the carburetor and see if that works.
My 97 has done this since the day I got it. I've found that when this happens, if I chicken-wing my legs out, it stops. That is to say, if I bring my knees away from the bike, giving a good air space for the wind to flow straight through, I don't have the problem. Unfortunately, thats really darn irritating. I've got a drilled airbox cover these days, and it *didn't solve it*, so don't bother
Another data point: usually when I come to a stop, no amount of wind will make this happen. I'm more likely to get blown over sideways than to have the bike stall at a stop.
Your bike may need a rejet. It's probably on the edge of 'too lean' where a surge of air causes it to go too lean to run. If you want to do some experimenting, some shims on the needle may offset the condition slightly if this is the issue.
I've already got 2 or so thin stainless washers in; 42 pilot and a 118 main, but I may add another washer to see what the difference is. I'm at about 500ft above sea level. Oh, and pilot screw is ~3 turns out.
Have you read your plug recently? I'm working on tuning mine now, so I'm not sure if 118 is a very rich jet, though it doesn't sound like it. I'm currently running a 122.5 from ProCycle at sea level. I'm not sure what the conversion is though.
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
TW200 Forum
532.4K posts
23.4K members
Since 2010
A forum community dedicated to Yamaha TW200 owners and enthusiasts. Come join the discussion about performance, exhaust, suspension, parts, modifications, troubleshooting, maintenance, and more!