Low cylinder temp.

Woe unto you that bought the first model year of a major remake, perhaps this section can help address any 2014 and later model Ural "imperfections". Here's a special section for folks with the latest rigs to discuss 2014 and later model-related topics such fuel injection, 3-wheel disc brakes, hydraulic steering dampers, spin-on oil filters and other anomalies that don't belong on true Russsian motorcycle ;-P We've gone from using big hammers and greasy wrenches to needing computers and Ouija boards in order to fix our rigs.
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Please keep this section specific to issues pertaining to 2014 and later models such as fuel injection, sidecar and rear disc brakes and so forth. Ask general or non-2014 and later specific questions in the main Hammerin' & Wrenchin' section.
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Speedbump
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Low cylinder temp.

Postby Speedbump » Mon Apr 30, 2018 8:35 am

I have noticed that my RH exhaust had blued more and faster then the LH om my 2015 Retro, now with 15,000km on the odo. I finally installed a CHT gauge and confirmed the LH cylinder takes longer to "warm up" , but will eventually got to the same temp. I started the bike the other day and waited until the RH side got to ~100 deg. then shut her down. While the RH rocker cover was hot to the touch, the LH was not. Drove 3 miles and the CHT said both cylinders were at about the same temp of ~250 deg. No recent loss of power or anything else to indicate a problem. Thoughts?
Glen³
2015 Retro.

Yeah, I got something on the side.

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windmill
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Re: Low cylinder temp.

Postby windmill » Mon Apr 30, 2018 9:33 am

No CHT on my M70, but pipe color and when hooked up to OBD2 tool indicate a similar disparity. On my 07 Patrol an ID thermometer would also show the same.
I could speculate why, but don't really have a irrefutable explanation and never sought one, many others have observed the same. Just seems to be the nature of the beast.
Barry

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Re: Low cylinder temp.

Postby Mr Wazzock » Mon Apr 30, 2018 12:27 pm

Suspect throttles out of balance, best check/sort this out ASAP else real risk of RH side doing most or all of the work and over stressing itself. (As my dealer would put it, the LH side "is just along for the ride" :D )
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Re: Low cylinder temp.

Postby Speedbump » Mon Apr 30, 2018 5:11 pm

Thanks for the input guys. I just did a 10 mile ride and after she warmed up the temps were the same. Guess I have something to work on at CRAP.
Glen³
2015 Retro.

Yeah, I got something on the side.

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1977 GS550
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hotflash44
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Re: Low cylinder temp.

Postby hotflash44 » Mon Apr 30, 2018 6:19 pm

Speedbump wrote:I have noticed that my RH exhaust had blued more and faster then the LH om my 2015 Retro, now with 15,000km on the odo. I finally installed a CHT gauge and confirmed the LH cylinder takes longer to "warm up" , but will eventually got to the same temp. I started the bike the other day and waited until the RH side got to ~100 deg. then shut her down. While the RH rocker cover was hot to the touch, the LH was not. Drove 3 miles and the CHT said both cylinders were at about the same temp of ~250 deg. No recent loss of power or anything else to indicate a problem. Thoughts?
think the left almost is always slightly cooler than the right, maybe because the side car blocks some of the wind. my CHT almost always shows a 3 to 5 deg hotter right side. as to the blue not sure. driving 3 miles and temp okay, don't think i would worry,IMHO. ps wouldn't hurt to have it looked, at just to make sure. :cheers:
drive a 2016 gear up asphalt grey .Air America CIA circa 1967/8 Vung Tau Viet Nam USS Tutuila ARG-4 (AND JUST A TOUCH OF AGENT ORANGE!)

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Re: Low cylinder temp.

Postby Tomcatfixer » Mon Apr 30, 2018 7:28 pm

Normally, at speed, the right cylinder is the cooler one, due to the hack directing additional cooling air over the jug. At idle, they should have identical temperatures, unless the direction the crank spins throws cooling oil more effectively on one cylinder over the other. It's probably just as Mike suggests: out of balance throttle bodies.
- Chad

Virginia Beach, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 1999 Ural Tourist "Desert DisGrace: the Iron (Oxide) Curtain", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

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2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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Re: Low cylinder temp.

Postby Donbmw » Mon Apr 30, 2018 7:31 pm

CHT temps for the most part will not be the same for each cylinder.
2015 Patrol, 1980 R65, 1982 R65 bought new, 1975 R 90/6, 1959TR3 Triumph

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Re: Low cylinder temp.

Postby hotflash44 » Mon Apr 30, 2018 8:52 pm

Donbmw wrote:CHT temps for the most part will not be the same for each cylinder.
agree my 2016 temps rarely are the same usually 5 to 7 degrees apart and i love the way it runs,great power no hesitation good torque. :cheers:
drive a 2016 gear up asphalt grey .Air America CIA circa 1967/8 Vung Tau Viet Nam USS Tutuila ARG-4 (AND JUST A TOUCH OF AGENT ORANGE!)

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Re: Low cylinder temp.

Postby 124c41plus » Tue May 01, 2018 3:32 pm

Right cylinder always runs warmer.
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Orlando, Florida

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Tomcatfixer
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Re: Low cylinder temp.

Postby Tomcatfixer » Tue May 01, 2018 3:36 pm

Right cylinder always runs warmer.

...maybe on YOUR Ural, but not on ALL Urals.
- Chad

Virginia Beach, Virginia, USA

Current rides:
2015 Ural cT "Mobile Chernobyl", 1999 Ural Tourist "Desert DisGrace: the Iron (Oxide) Curtain", 1994 Honda VFR750F, 1986 Yamaha FZX700S Fazer

Previous rides:
2007 Honda VTR1000 FireStorm (Super Hawk in U.S.)
2001 Buell Blast! - - - - - - - 2005 Yamaha FJR1300
1993 Honda CBR600F2 - -1984 Yamaha FJ1100
1986 Yamaha FZX700S (a different one than above)

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Re: Low cylinder temp.

Postby Eric N » Tue May 01, 2018 7:51 pm

When's the last time you checked your valves? Right exhaust tighter than left?
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Re: Low cylinder temp.

Postby Speedbump » Wed May 02, 2018 6:57 am

Adjusted valves 4 days ago. Once the bike is warmed up all temps are good. Will try to balance the TB's today.
Glen³
2015 Retro.

Yeah, I got something on the side.

Previous rides:
1977 GS550
1979 XS750


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