Things that young'uns don't understand

Tips, tricks, questions and answers to tech questions
Demannu
Posts: 1882
Joined: Sat May 08, 2021 5:14 pm
Location: Another day without using algebra
Has thanked: 65 times
Been thanked: 1235 times

Things that young'uns don't understand

Post by Demannu »

Like 2t owners checking the weather forecast in winter and guessing what jets they'll use today!
User avatar
DefTrap
Posts: 4494
Joined: Tue Apr 14, 2020 8:23 am
Has thanked: 2259 times
Been thanked: 2190 times

Re: Things that young'uns don't understand

Post by DefTrap »

To be honest I always found my normally aspirated 4 strokes always seemed to run better on the cold, crisp morning run to work in Winter. (my fingers & gonads, not so much).

Not that I ride in the early morning any more, certainly not if it's cold FFS. So, on reflection, maybe my 'summer jetting' is and continues to be wonky.
Last edited by DefTrap on Tue Jan 09, 2024 11:20 am, edited 1 time in total.
User avatar
Count Steer
Posts: 11802
Joined: Mon Jul 19, 2021 4:59 pm
Has thanked: 6375 times
Been thanked: 4746 times

Re: Things that young'uns don't understand

Post by Count Steer »

My 2T certainly ran better when there was some moisture in the air. Not exactly steam injection but I think the science backs it up.
Doubt is not a pleasant condition.
But certainty is an absurd one
.
Voltaire
User avatar
Skub
Posts: 12166
Joined: Mon Mar 16, 2020 5:32 pm
Location: Norn Iron
Has thanked: 9819 times
Been thanked: 10144 times

Re: Things that young'uns don't understand

Post by Skub »

A mate used to have a barometer in his race van to give him an idea of jetting on the day.
"Be kind to past versions of yourself that didn't know what you know now."
Walt Whitman
https://soundcloud.com/skub1955
Bustaspoke
Posts: 1804
Joined: Wed Mar 18, 2020 5:55 pm
Has thanked: 3253 times
Been thanked: 1737 times

Re: Things that young'uns don't understand

Post by Bustaspoke »

The Isle of Man TT 2 stroke jetting dilema,Sulby straight or the Mountain..
Le_Fromage_Grande
Posts: 11233
Joined: Mon Mar 16, 2020 6:40 pm
Location: The road of many manky motorcycles
Has thanked: 607 times
Been thanked: 4124 times

Re: Things that young'uns don't understand

Post by Le_Fromage_Grande »

I've never had a road 2 stroke that was that fickle, even the race ones it's a tiny difference between it being spot on and a little rich, the trouble with running spot on was that it didn't take much for it to go from spot on to lean, and lean means holed pistons, so I always ran a bit rich, I do the same with 4 strokes, not that an 8 valve 1170 that only revs to 9000rpm is especially fussy about jetting (it's more fussy about ignition timing)
User avatar
mangocrazy
Posts: 6892
Joined: Tue Dec 22, 2020 9:58 pm
Has thanked: 2402 times
Been thanked: 3625 times

Re: Things that young'uns don't understand

Post by mangocrazy »

The vital role of blue Rizlas in setting contact breaker gaps...
There is no cloud, just somebody else's computer.
User avatar
Count Steer
Posts: 11802
Joined: Mon Jul 19, 2021 4:59 pm
Has thanked: 6375 times
Been thanked: 4746 times

Re: Things that young'uns don't understand

Post by Count Steer »

A bunch of us got hold of a micrometer and checked whose thumbnail was nearest 25thou for setting plug gaps. :D
Doubt is not a pleasant condition.
But certainty is an absurd one
.
Voltaire
User avatar
Cousin Jack
Posts: 4450
Joined: Mon Mar 16, 2020 4:36 pm
Location: Down in the Duchy
Has thanked: 2549 times
Been thanked: 2285 times

Re: Things that young'uns don't understand

Post by Cousin Jack »

The art of kickstarting a single.

And the pain of getting it wrong.
Cornish Tart #1

Remember An Gof!
User avatar
Rockburner
Posts: 4374
Joined: Sun Mar 15, 2020 11:06 am
Location: Hiding in your blind spot
Has thanked: 7810 times
Been thanked: 2527 times

Re: Things that young'uns don't understand

Post by Rockburner »

Cousin Jack wrote: Tue Jan 09, 2024 1:18 pm The art of kickstarting a single.

And the pain of getting it wrong.
Especially a left-foot kick-start (eg MZ).
non quod, sed quomodo
User avatar
KungFooBob
Posts: 14196
Joined: Sat Mar 14, 2020 1:04 pm
Location: The content of this post is not AI generated.
Has thanked: 539 times
Been thanked: 7526 times

Re: Things that young'uns don't understand

Post by KungFooBob »

But theres fuck all kick back/compression on an a two stroke MZ, I could start my 301 by rocking it backward then forward in gear.
User avatar
Rockburner
Posts: 4374
Joined: Sun Mar 15, 2020 11:06 am
Location: Hiding in your blind spot
Has thanked: 7810 times
Been thanked: 2527 times

Re: Things that young'uns don't understand

Post by Rockburner »

KungFooBob wrote: Tue Jan 09, 2024 2:00 pm But theres fuck all kick back/compression on an a two stroke MZ, I could start my 301 by rocking it backward then forward in gear.
It was more the fact that the pilion peg was sited to catch your ankle bone as you kicked.... My dad was very pissed off about the hole I tore in his boots... (trying to start it in trainers was not going to happen).
non quod, sed quomodo
User avatar
Horse
Posts: 11549
Joined: Sun Mar 15, 2020 11:30 am
Location: Always sunny southern England
Has thanked: 6186 times
Been thanked: 5087 times

Re: Things that young'uns don't understand

Post by Horse »

mangocrazy wrote: Tue Jan 09, 2024 12:51 pm The vital role of blue Rizlas in setting contact breaker gaps...
No no no! You need to go electronic - much easier.

Tune a transistor radio to between stations static.

Ignition on. Gradually turn the crank. You'll hear a 'pop' when the points open. Check it coincides with the markers.

Easy!
Even bland can be a type of character :wave:
User avatar
mangocrazy
Posts: 6892
Joined: Tue Dec 22, 2020 9:58 pm
Has thanked: 2402 times
Been thanked: 3625 times

Re: Things that young'uns don't understand

Post by mangocrazy »

Horse wrote: Tue Jan 09, 2024 2:03 pm
mangocrazy wrote: Tue Jan 09, 2024 12:51 pm The vital role of blue Rizlas in setting contact breaker gaps...
No no no! You need to go electronic - much easier.

Tune a transistor radio to between stations static.

Ignition on. Gradually turn the crank. You'll hear a 'pop' when the points open. Check it coincides with the markers.

Easy!
I made up a little battery-powered device with a 9v bulb in circuit and a couple of small croc clips. When the light went out the points had opened.

I was sick of the Rizlas getting wet and turning into Rizla-shaped decorations, plus it was more sensitive/accurate.
There is no cloud, just somebody else's computer.
JackyJoll
Posts: 3728
Joined: Sun May 03, 2020 10:11 pm
Has thanked: 261 times
Been thanked: 1265 times

Re: Things that young'uns don't understand

Post by JackyJoll »

mangocrazy wrote: Tue Jan 09, 2024 2:06 pm
Horse wrote: Tue Jan 09, 2024 2:03 pm
mangocrazy wrote: Tue Jan 09, 2024 12:51 pm The vital role of blue Rizlas in setting contact breaker gaps...
No no no! You need to go electronic - much easier.

Tune a transistor radio to between stations static.

Ignition on. Gradually turn the crank. You'll hear a 'pop' when the points open. Check it coincides with the markers.

Easy!
I made up a little battery-powered device with a 9v bulb in circuit and a couple of small croc clips. When the light went out the points had opened.

I was sick of the Rizlas getting wet and turning into Rizla-shaped decorations, plus it was more sensitive/accurate.
It was also easy to clip a bulb across the moving point and the casing and switch the ignition on. Then the bulb lit up when the points opened.
JackyJoll
Posts: 3728
Joined: Sun May 03, 2020 10:11 pm
Has thanked: 261 times
Been thanked: 1265 times

Re: Things that young'uns don't understand

Post by JackyJoll »

Bustaspoke wrote: Tue Jan 09, 2024 11:27 am The Isle of Man TT 2 stroke jetting dilema,Sulby straight or the Mountain..
I never raced, but I remember the TZ350 sidecar guys saying that if they got past Ballacraine on the first lap, they had hopes of finishing the race.
Demannu
Posts: 1882
Joined: Sat May 08, 2021 5:14 pm
Location: Another day without using algebra
Has thanked: 65 times
Been thanked: 1235 times

Re: Things that young'uns don't understand

Post by Demannu »

Bustaspoke wrote: Tue Jan 09, 2024 11:27 am The Isle of Man TT 2 stroke jetting dilema,Sulby straight or the Mountain..
Or EMP or Thursday afternoon
It was alway mountain jetting for me btw, better to be 500rpm shy than seized at the 33rd
User avatar
Horse
Posts: 11549
Joined: Sun Mar 15, 2020 11:30 am
Location: Always sunny southern England
Has thanked: 6186 times
Been thanked: 5087 times

Re: Things that young'uns don't understand

Post by Horse »

Very boring listening to a disconnected light bulb the rest of the time.
Even bland can be a type of character :wave:
JackyJoll
Posts: 3728
Joined: Sun May 03, 2020 10:11 pm
Has thanked: 261 times
Been thanked: 1265 times

Re: Things that young'uns don't understand

Post by JackyJoll »

Cousin Jack wrote: Tue Jan 09, 2024 1:18 pm The art of kickstarting a single.

And the pain of getting it wrong.
I’m rubbish on a bike, but I’m pretty good at getting kicked back without getting hurt or falling in the gutter. Takes practice!
Bustaspoke
Posts: 1804
Joined: Wed Mar 18, 2020 5:55 pm
Has thanked: 3253 times
Been thanked: 1737 times

Re: Things that young'uns don't understand

Post by Bustaspoke »

JackyJoll wrote: Tue Jan 09, 2024 2:21 pm
Cousin Jack wrote: Tue Jan 09, 2024 1:18 pm The art of kickstarting a single.

And the pain of getting it wrong.
I’m rubbish on a bike, but I’m pretty good at getting kicked back without getting hurt or falling in the gutter. Takes practice!
In that case,when I finally get around to putting my XT600 back together you might be getting a call,it has 3 wires on the ignition pickup & from what I've read it does both the advance & retard.I know where one of the wires goes,but as the other two failed I'm not sure what way around to connect them .I think that if I get them the wrong way round I'll be getting launched over the bars :wtf: