Fozzie Posted January 8, 2016 Posted January 8, 2016 Like I mention, it's only a solution if that's how the bike was set up like the Aprilia I referenced, it had no idle screw, its idle was controlled by throttle position held by the cable. Crude wasn't the word Bike only has a handful of sensors if it's like the CBF. Moos CBF does have an idle control screw, and it was cutting out so I replaced the lot and fuel pump. It was inexpensive and cured the issue! Quote
Wynne G Oldman Posted January 8, 2016 Posted January 8, 2016 My bike doesn't have an idle screw, tickover is controlled by the ECU. I wonder if it's the same with the YBR? Quote
Guest Posted January 8, 2016 Posted January 8, 2016 My bike doesn't have an idle screw, tickover is controlled by the ECU. I wonder if it's the same with the YBR?It's not... I mentioned it's on the throttle body Anyhow, fitting the TB tomorrow so will report back with my findings. Quote
Wynne G Oldman Posted January 8, 2016 Posted January 8, 2016 My bike doesn't have an idle screw, tickover is controlled by the ECU. I wonder if it's the same with the YBR?It's not... I mentioned it's on the throttle body Ah, sorry, I missed that. Quote
Guest Posted January 9, 2016 Posted January 9, 2016 TB change didn't work. Continuity found in sensors. Gave up. It is now with the mechanics for a proper diagnosis. Quote
Scud Posted January 13, 2016 Posted January 13, 2016 It sounds suspiciously like an air leak somewhere, are the exhaust headers seated and tightened properly? Quote
Dav3y Posted January 14, 2016 Posted January 14, 2016 Are you still getting the bus to work Phil or has Sabrinas bike been sorted ? Quote
Guest Posted January 26, 2016 Posted January 26, 2016 Problem sorted.My diagnosis of the coil was correct... My decision to order an aftermarket one was apparently not.New OEM coil on, all good. Quote
Guest Posted January 27, 2016 Posted January 27, 2016 Good good, too many puddles maybe ?Nah. Just one of those things! Never mind. Quote
Fozzie Posted January 28, 2016 Posted January 28, 2016 The words Yamaha and buggered coil end up in the same sentence a lot.Older models of Yammies seem to have this issue, I've known a good few. Glad it's sorted! It sounded electrical but it's always hard to track the things down without meticulous checking and rechecking! Quote
jimmyc Posted July 6, 2018 Posted July 6, 2018 hi im having problems with my ybr250 just wondering if you could sell me the spare 1 you had,i stripped and cleaned mine but in the process snapped the throttle position sensor,got another and the engine management went out,but was bogging under high load, stripped and cleaned again ,but this time wouldn't start, not priming,changed the fuel pump but now will start but very boggy and wont tick over,and management light on ,im looking to replace the throttle body as quite sure its that, otherwise I might have to strip tank down and double check the fuel pump,noticed that when you switch bike off I can hear bike priming,not sure if that's right any advice warmly welcomed jim Quote
Phill Posted July 7, 2018 Posted July 7, 2018 Are you sure it doesn't have a throttle position senson??Symptoms do sound consistent with a dodgy TPS. there is a TPS in the FI model .Link: http://ybr125owner.blogspot.com/2014/08/yamaha-ybr-125-throttle-position-intake.html Quote
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