Triumph Tiger 800 Forum

Tiger 800 / 900 - Main Discussion Section => Misc Technical Help Required => Topic started by: Flyingbanana on November 23, 2020, 11:49:29 AM

Title: Engine Braking
Post by: Flyingbanana on November 23, 2020, 11:49:29 AM
Hello all you lovely people. Hope you are all safe & well during these difficult times.

I use my Tiger 800 roadie 2013  bike to commute to & thro work & have noticed the engine braking to be more extreme than it used to be. I know when the throttle is closed that the bike will have an amount of engine breaking but now it just seems to be more. for example if in 2nd in town & i shut the throttle i have to quickly engage it again as it slowing very quickly .

I have put the bike in neutral and free wheeled down the road with out the bike slowing so to me that says the brakes are not sticking

I change the oil every year/6k miles but have neglected the air filter but that was done two weekends ago. I did notice the coolant was very very low so had to top it all up.

help please :440:

alan
Title: Re: Engine Braking
Post by: Grumps on November 23, 2020, 11:53:10 AM
Only thing I can think of is the colder autumn air affecting the mixture and engine characteristics.
Title: Re: Engine Braking
Post by: Flyingbanana on November 23, 2020, 12:14:52 PM
Hi Grumps, thanks for the reply. Maybe the bike like i don't like this time of the year. I did put in some STP Fuel cleaner to see if that helps but no. I did wonder if i may have cooked the oil by running with very minimal coolant ?
Title: Re: Engine Braking
Post by: Fazer on November 23, 2020, 12:33:51 PM
When I first saw the title of this posting I thought it was from someone who was ‘breaking’ an engine for parts. I was surprised to find it was actually referring to the ‘braking’ effect of an engine. 😂😂😂
Title: Re: Engine Braking
Post by: Flyingbanana on November 23, 2020, 01:47:16 PM
 DOH !! - :493:
Thanks Fazer. i am such a nugget
Title: Re: Engine Braking
Post by: Grumps on November 23, 2020, 03:58:04 PM
*Originally Posted by Flyingbanana [+]
Hi Grumps, thanks for the reply. Maybe the bike like i don't like this time of the year. I did put in some STP Fuel cleaner to see if that helps but no. I did wonder if i may have cooked the oil by running with very minimal coolant ?

I doubt it. Oil is pretty robust.
Title: Re: Engine Braking
Post by: D6864 on November 24, 2020, 10:14:58 AM
Perhaps you had less engine braking than you should but have fixed it now!

My guess would be that you've disturbed something when replacing the air filter, perhaps the crankcase breather pipe.
Title: Re: Engine Braking
Post by: steve@lincs on November 24, 2020, 04:44:16 PM
Don't want to teach granny etc, but could it be brakes are binding slightly?
Title: Re: Engine Braking
Post by: Flyingbanana on November 26, 2020, 08:48:16 AM
Hi Steve, thanks for the post. If i put the bike in neutral on a downward slope & release the brakes the bike run freely & gains speed
Title: Re: Engine Braking
Post by: steve@lincs on November 26, 2020, 09:10:14 AM
Not that then! it was just a thought and has your fuel consumption  changed?
 hope you sort it soon
Title: Re: Engine Braking
Post by: fac191 on November 26, 2020, 09:36:11 AM
You could get the ECU released and get it set up how you want. Lol when I went from my Tiger to the Super Tenere the engine braking was so severe it felt like you were going over the bars !. Had it remapped straight away it felt almost unrideable.
Title: Re: Engine Braking
Post by: Aussie Tiger on November 26, 2020, 09:38:24 AM
Chain too tight?
Title: Re: Engine Braking
Post by: Flyingbanana on November 27, 2020, 09:43:44 AM
Going to chk the chain this weekend. really tough to do when getting home from work in the dark dank weather ! :004:
Title: Re: Engine Braking
Post by: Grumps on November 27, 2020, 10:49:58 AM
*Originally Posted by Aussie Tiger [+]
Chain too tight?

That's a good shout. But he does say it freewheels ok so maybe not. But always worth checking anyway.
Title: Re: Engine Braking
Post by: Flyingbanana on November 27, 2020, 11:32:28 AM
the chain is ready for a tickle
Title: Re: Engine Braking
Post by: romanrick on November 28, 2020, 05:46:21 PM
Did you check the brakes are  not binding after a ride, they can start to bind with use then free up as they cool. I would also check all the running gear, is the chain too tight, wheel bearings ok, tires  pressures  correct ?
Title: Re: Engine Braking
Post by: fac191 on November 28, 2020, 08:14:14 PM
Just for the sake of it i would also check the front sprocket out.
Title: Re: Engine Braking
Post by: Flyingbanana on December 01, 2020, 10:15:08 AM
Morning all you lovely people. Checked the chain at the w/end and was a tad slack so tightened it.

I always find the old chain tinkering a bit of a pain.Maybe someone could enlighten me. There is always a tight spot - Why as this always puts my mind in doubt when you are setting the tension as the tight spot can seem really tight when the slackest part is now in the correct tension measurements. The chain is not that old either.
Title: Re: Engine Braking
Post by: Grumps on December 01, 2020, 12:23:47 PM
Chains should be adjusted at the tight spot. If you set at the slack it means that you get a 'jerk' at the tight spot that can damage sprockets and bearings.
Title: Re: Engine Braking
Post by: Flyingbanana on December 01, 2020, 12:52:47 PM
 :493: that's where i took the measurements, right at the tight spot.
Title: Re: Engine Braking
Post by: philmcglass on December 01, 2020, 11:59:27 PM
*Originally Posted by Flyingbanana [+]
... There is always a tight spot - Why ...

I assume (just a guess) it is because rear sprocket is not totally concentric with the rear axle spindle.
Possibly some slack in the alignment of fasteners so slightly eccentric.
Title: Re: Engine Braking
Post by: Paulhere on December 02, 2020, 12:43:39 PM
Chains rarely wear out evenly.
Title: Re: Engine Braking
Post by: Flyingbanana on December 02, 2020, 02:09:29 PM
*Originally Posted by Paulhere [+]
Chains rarely wear out evenly.

Yeah & isn't it a pain. I find myself setting the tension at the tight spot but the other end can still be towards the end of the tension limits. Oh well. save up for a none chain driven bike. No crwaling around on hands and knees measuring & turning one or two faces on the nut to pull wheel back. Getting too old for this :033:
Title: Re: Engine Braking
Post by: Paulhere on December 02, 2020, 03:10:34 PM
*Originally Posted by Flyingbanana [+]
Yeah & isn't it a pain. I find myself setting the tension at the tight spot but the other end can still be towards the end of the tension limits. Oh well. save up for a none chain driven bike. No crwaling around on hands and knees measuring & turning one or two faces on the nut to pull wheel back. Getting too old for this :033:

Tight/loose spots more'n a few mm different, sign chain's tired. I set at 40-45mm slack & never need touch it again 'til it's on way out. All my other Trumpies with 530 chains, got 30k'ish. Me T800 only done 13k chain still as new, dunno if 525 lasts same.