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Randy's Cycle Service Explains Carburetors, Choke & Cold Starting - vintage motorcycles @ rcycle.com

Randy's Cycle Service Explains Carburetors, Choke & Cold Starting - vintage motorcycles. Randy's Cycle Service & Restoration in central Virginia USA. We service & restore all makes & models. We do not source or stock parts or sell vehicles. Technical advice starting at $25. Randy's Cycle Service & Restoration, www.rcycle.com


 


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How Motorcycle Carburetors work and how to tune and clean them
Here's a link to the kind of carb cleaner I like best (it IS the best) http://www.amazon.com/gp/product/B002ERT666/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B002ERT666&linkCode=as2&tag=httpww wyou00f-20 hey... awesome video..nicely explained ! just one question. Please do tel me wts AIR NEEDLE and LOW JET used for again. ? i mean how and what do they work? thanx :) Reply · The air needle is like a transitional restriction to increase vacuum pressure and tapered to prime the main jet flow gradually to ramp up fuel flow from the idle/low circuit to the main circuit. Think of the circuits like gears or stairs. The needle covers transition between 3rd gear to about 5th gear on a six speed. It overlaps basically. Fuel is getting by it from the idle/low- on through to where it's completely out of the way of the main jet and the main jet fuel flow is roaring like the straw/compressor example. Without the needle the carb would work, but not as smoothly through middle throttle (where most people ride and have the most fine input or throttle roll back and forth. The low jet is like second gear on a transmission. You can shift from 1st to 3rd, but again you risk stalling and it won't be as smooth. Also there isn't really the mechanical inertia to carry the process on like you have with a rolling vehicle with a flywheel on the engine and the wheels turning. The pistons still create vacuum every other time they go down, but air just doesn't have the punch that steel does when in motion. The circuits in a carburetor have to be there or you would have a limit on RPM range. An idle jet can't deliver enough fuel to really scream, and the main jet couldn't go slow and would be VERY hard to start because the engine would have to be spun up really fast. So you have usually four or five circuits (I want to say jets, but their physically different) that get air flow like stairs as the throttle opens. They are typically 1. Starting circuit (choke on) 2. Idle circuit 3. low jet 4. Jet Needle 5. Main jet. How Motorcycle Carburetors work and how to tune and clean them Check out my other channel here http://www.youtube.com/watch?v=1KKvwMaIotA





Two-Stroke Scooter / ATV Carburetor Settings And Adjustments 2of4 : Idle Speed & Mixture
Part 2 of a 4 part video detailing all of the basic settings and adjustments of the carburetors found on Minarelli / Jog / 1E40QMB powered 50-90cc scooters and youth ATVs. Part 2 shows how to adjust the idle speed and mixture settings. Please like the video if you found it to be helpful.





CV Carburetor
How a cv carburetor works. Sound of a YAMAHA XTZ750 Super Tenere.





Mikuni Carb series #4 How a Mikuni carb works.
Ever wonder how a carb works - I'll explain it.





Bicycle Engine Kit Carburettor Needle Setting Tips
How to install and check the cable, spring, barrell, needle and clip that dwell on the inside of the carburettor of your bicycle engine kit.





basic carburettor adjustment (tuning) 4 stroke, and how it works.
In this part 1 of two video i am showing you where the different parts and adjustments are on my old honda with a new carbie works on most small carbies. i will show you what to look for when tuning your carbie! please enjoy and watch my other videos. :D i will make a part 2 tomorrow! this one is on my honda xl100 1974 classic honda style, but is the same, for classic and new yamaha kawasaki suzuki and all small bikes pretty much. motorbikes and cars are simular. how to adjust the fuel air mixture and the idle speed. riding it to test the tuning.





How to clean a carburetor in 15 minutes
These same instructions apply to most other slide throttle style carbs from Mikuni, Keihin, etc You can also take out the idle screw and spring while cleaning if you wish, but typically that isn't required.





how to clean and adjust your 4 stroke carb pitbike
this carb is from 110cc four stroke pitbike music is by offspring





Reassembling Keihin PWK Carburetor
Reassembling Keihin PWK carburetor





How to clean motorcycle carburetors
Longtime viewers will see this as a refresher, but it does have some new tips not included in my previous carb videos





How To Tune Up A Royal Enfield Bullet Motorcycle - Ignition Timing And Point Gap
Here's how to tune up a Royal Enfield Bullet Motorcycle. I go over the static method of setting the point gap and ignition timing. This is the tune-up procedure recommended by the Royal Enfield company. To set the point gap, remove the points cover and turn the engine around until the points are open their widest. Then set them to .40 mm, making sure the feeler gauge goes in and out with a little bit of resistance. Setting the timing is outlined in the video. I used the official Royal Enfield tool to measure the height of the piston, and then set it so that the points close at .8 mm before top dead center. This is a good time to examine your spark plug and clean or replace it. Once you've done this tune up to your Royal Enfield Bullet, take your Royal Enfield Bullet Motorcycle for a ride to check for any loss of power or pinging from the engine. The engine will ping if the ignition is too advanced, so if you hear a ping, retard it. See my Royal Enfield Bullet 500 at http://www.hoohoohoblin.com/





Mikuni Carb Series # 3 assembly video with details.
This is how you assemble a cleaned mikuni carb.





Carburador VM
Carburador Venturi Movil Funciona operando el acelerador que directamente abre o cierra la cortina, aumentando o cerrando el paso de aire - gasolina! Opera perfectamente en motores de 2T en bajas y altas revoluciones, aunque en los motores de 4T opera mejor en bajas revoluciones.





Motorcycle tyre repair - How to plug a bike tire
Today the Cycle Torque crew present 'How to repair a tubeless tyre' using the Cargol Twist and Go and wick systems.





How to change piston / top end rebuild 2002-2007 Honda Cr 250
Join the FREZ PRODUCTIONS Facebook site! https://www.facebook.com/frezproductions I`ve got many nice comments for making the "Honda Cr 125 piston / top end rebuild" movie. In this movie, I show in good detail how to chance the piston on your two stroke Honda Cr 125. A similar movie for the Honda Cr250 would be nice, and that's what I have made. Hope you like it! The bike used in this movie is a 2007 Honda Cr250. Always use the right manual for your bike! The 2002-2007 Honda Cr250 bikes are very much alike but there are some changes. That's why the right manual for your year is important. Good luck! Frez Productions





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