timing?
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Senior Member
SuperBike
Joined: Apr 2010
Posts: 1,090
From: Big Lick
timing?
what would the symptoms be for my hawk if perhaps the timing chain slipped a tooth? Reason I ask is because I've had my bike in the shop for this and the mechanic has finally given up trying to figure it out. Originally the bike went in for carb rebuild. after that and a few other small odds and ends, the bike was not running right when I picked it up. basically, it has a miss and some backfiring through the carb on occasion. he's checked electrical things, including throttle position sensor and coils. any thoughts?
VTR virgin
Superstock
Joined: Mar 2015
Posts: 447
From: Auckland, New Zealand
For your own peace of mind, why not pull the cam covers and check the indexing of the cam sprockets to the crank? On the back head at least, it's a pretty painless task. There are inscribed lines on the cam sprocket that will sit exactly parallel to the gasket surface when the crank is lined up to an index mark.
Thread Starter
Senior Member
SuperBike
Joined: Apr 2010
Posts: 1,090
From: Big Lick
given the symptoms, I'm concerned with valve open/close operations. it has never had valve clearance checked. for some reason these guys didn't want to do that. I'm just looking for ideas to start troubleshooting before I decide what to do next.
Thread Starter
Senior Member
SuperBike
Joined: Apr 2010
Posts: 1,090
From: Big Lick
For your own peace of mind, why not pull the cam covers and check the indexing of the cam sprockets to the crank? On the back head at least, it's a pretty painless task. There are inscribed lines on the cam sprocket that will sit exactly parallel to the gasket surface when the crank is lined up to an index mark.
Senior Member
SuperBike
Joined: Sep 2010
Posts: 1,994
From: Bisbee, AZ
The bike sat for a year or more. Had a local shop rebuild the carbs. Now the bike has running issues.
You don't need to be Sherlock Holmes to figure this one out.
Not being a dick, but don't make a problem more complicated than it is.
You don't need to be Sherlock Holmes to figure this one out.
Not being a dick, but don't make a problem more complicated than it is.
Thread Starter
Senior Member
SuperBike
Joined: Apr 2010
Posts: 1,090
From: Big Lick
Yeah, I understand that, but not quite so easy. these guys are very good at what they do. they just can't diagnose this any further. it had these symptoms, but very slight, when it was running. they have checked and rechecked the settings, plus vacuum leaks. I did the same the old fashioned way with carb spray while running. no idle changes. Frankly, there's no turning back from the carb rebuild at this point. so I can only move forward and try to diagnose the problems. they also cleaned up and repaired an exhaust leak I had to be sure that didn't have any influence on the problem.
Senior Member
SuperBike
Joined: Sep 2010
Posts: 1,994
From: Bisbee, AZ
Yeah, I understand that, but not quite so easy. these guys are very good at what they do. they just can't diagnose this any further. it had these symptoms, but very slight, when it was running. they have checked and rechecked the settings, plus vacuum leaks. I did the same the old fashioned way with carb spray while running. no idle changes. Frankly, there's no turning back from the carb rebuild at this point. so I can only move forward and try to diagnose the problems. they also cleaned up and repaired an exhaust leak I had to be sure that didn't have any influence on the problem.
VTR virgin
Superstock
Joined: Mar 2015
Posts: 447
From: Auckland, New Zealand
Given the bike's history I would suggest that pulling electrical connectors apart and cleaning any corrosion might be worthwhile. I had an issue with a midrange misfire (on my ST1100) that I was sure was carbs, turned out to be corrosion on the red connector that feeds power to/from the right bar switches and then to the ignition, leading to a weak spark.
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Squid
Joined: Jun 2016
Posts: 44
From: Ontario, Canada
I had a similar issue and it turned out that the kick stand switch was vibrating, engaging and trying to kill the motor while I was riding. Not enough to set off the dash light, but it kept hiccupping intermittently as well.
Rex Kramer-Thrill Seeker
SuperBike
Joined: Jan 2011
Posts: 2,312
From: Brookfield, WI
Attached a couple leads from my multimeter and found it was the switch. Instead of buying a new one, I took it apart and cleaned it, then put dielectric grease on the contacts. Never had a problem after that.
Check the switch. If it isn't, at least we can rule that out.
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