would anyone have any ideas what might cause a minor but sudden drop in power on hard acceleration. My bikes being doing this for a couple of weeks, other than that its perfectly fine.
Could it be my iridium plugs betting a bit crusty maybe?
Does it pick up aftetwards? Does it only happen when the throttle is cracked open fast? Is it as soon as the throttle is opened fast or is it at certain revs?
re the drop in power, its an R1, 02, the injected sort.
I had a lot of expensive looking at it, but it hasn't solved the prob. It seems to happen more often in warm weather...?
I've got it going in for an hrs diagnostic next Thurs. Maybe that'll find the prob. (I bet it won't but I'm sure they'll tell me this and that and the charges of course - what can you do though. I'm not 3 mechanically minded and worse at electronics.
I was half hoping someone local, you know a kind friendly knowledgeable soul would offer to help me look at it... HINT HINT maybe maybe...(hopeful dog look) . I'd like to learn and don't mind getting my hands dirty, but haven't got the dosh to make mistakes.
If Thurs turns out crap, I might repost with the above as a title. You can only try can't ya.
The drop in power in hard acceleration could be , are you ready. The fuel pump, intake temp sensor, intake air pressure sensor, throttle position sensor, coolant temperature sensor, pressure regulator, atmospheric pressure sensor, lean angle sensor, speed sensor, exup servo motor. The self diagnostic should show the problem with the F1 light. With no F1 light illuminated on the dash it could be throttle position sensor, 1-4 ignition coils, 1-4 injectors, Air induction solenoid, if its none of these then its probably internal parts of the engine.
A definite maybe! (They say its good to be positive ;-)). Sorry about the delay, although i cleaned the fuel pump and had the exup valve serviced and a new cable.
But since i havent actually had the problem recur. It didnt happen on windey back so much as on full blown fast roads. Anyway fingers the fuel pump/ exup service have solved it.
11. throttle position sensor** 12. 1-4 ignition coils, 13. 1-4 injectors, 14. Air induction solenoid, 15. None of the above, then its probably internal parts of the engine.
Additionally 16 air filter, air induction hose collapse
ACTIONS TAKEN (so far) Local mechanic *serviced exup valve and replaced cable. *Cleaned electrical all connections.
I *cleaned fuel pump * washed out fuel tank and * renewed fuel line filter
Full Yamaha garage ( Metropolis, Vauxhall) * serviced the throttle position sensor(tps).
The problem hasnt recurred since. I think the root cause was the tps.
Big thanks to: Metropolis Vauxhall for their expertise in diagnosis + solutions; though you have wait 1-2 weeks for an appt! My brother, whos van was a helpful transport. I appreciate an R1's is no goldwing or blackbird, but if you got push it for 2 miles you'll loose a stone in sweat on the flat Bikermatch contributors- thankyou very much indeed for all clarifying questions and suggestions. Much appreciated.
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