20 Most Recent 2000 Sachs Bigroadster V3.8 Questions & Answers

In our perennial quest for HP and torque the topic of cam timing seems to be missing from the threads thus far posted. Yet cam timing can have a significant effect on overall engine performance and the mix between HP and torque. Since the HM has only a single cam per cylinder there isn’t anything we can due to vary the overlap for any given cam, but there is certainly some range of adjustability on how the overall cam timing is set by cylinder. With the stock cams, the timing specs for both cylinders are as follows at 1 mm valve clearance Intake Opening 15° B.T.D.C. Closing 65° A.B.D.C. Exhaust Opening 62° B.B.D.C. Closing 19° A.T.D.C. (Anyone have the specs of for the DP cams?) Certainly degreeing in the cams to spec is a good starting point, but my real question is how might HP and torque be impacted by advancing or retarding cam timing? There’s lots of information on how to degree a cam and people have been doing so since the old flat-head hot rod days, but information on how changing cam timing in and by itself affects overall performance and/or the mix between HP and torque (perhaps held as closely guarded trade secrets by the cam manufacturers +/or tuners).,,,

depends on what material is stained.. Aluminium stains can be very tricky to get clean if not impossible...some cleaners will also cause a orange/reddish stain wich will not come out unless you use some harsh chemicals to get them out. problem is it's hard to get to those chemicals. IF you happen to have a truck wash nearby where they wash the big trucks (18 wheelers)take your parts there and tell them to use some brightener on it it's a chemical that really cleans aluminium.it may cost you a little bit of money but that stuff really works and i haven't been able to find that stuff for private sale anywhere. the number 2 reasons for stains on the bike are : 1) waiting to long to wash the bike some types of sand/mud especially the red dirt we have down south here will stain a bike if you leave it on the bike not only that it dries as hard as concrete and is very difficult to remove , so was your bike ASAP. 2) washing chemicals. Some chemicals / soaps when they are left too long on aluminium will leave stains as it reacts with the aluminium , these stains are almost impossible to get out. ,,,

Yes All motorcycle chains currently being manufactured use Buna-N (Nitrile) rubber for their o-rings and x-rings and all these manufacturers recommend kerosene as a cleaner. Here's the formulation of WD-40: 80% Stoddard Solvent (that is similar to kerosene) 20% light lubricating oil and a bit of fragrance. Here's the compatibility of Stoddard Solvent with rubbers and plastics: Good Compatibility (OK for both static and dynamic seals) Buna-N (Nitrile) Chemraz Epichlorohydrin Fluorocarbon Fluorosilicone Kalrez Nitrile, hydrogenated Polyacrylate Teflon, virgin Mixed Compatibility (OK for static seals, but not for dynamic seals) Neoprene Vamac Fair Compatibility (OK for some static seals) Polysulfide Polyurethane, millable Poor Compatibility Butyl Ethylene-Propylene Hypalon Natural rubber Silicone Styrene Butadiene Consequently, WD-40 is safe and effective as a chain cleaner and corrosion inhibitor. Link: http://www.efunda.com/designstandard...dard%20Solvent If you clean with a soft brush and WD-40, and plan to follow-up with a chain lube, you can reduce chain lube sling-off if you first remove the oil residue that WD-40 leaves. This residue seems to prevent some chain lube formulations from sticking well to the chain.,,,

Question edited for clarity https://www.google.com/search?q=sachs+sfm+zx+125+parts Foot pegs https://www.google.com/search?q=sachs+sfm+zx+125+passenger+footpegs ..

Tryi this it may help

1

Make sure the vehicle is balanced on the centerstand. The centerstand is a metal bracket located in the middle on the bottom of the scooter. Engaging it means that the scooter is resting on the front tire and centerstand. The rear tire is raised slightly off the ground.

2

Insert your ignition key into the main ignition switch. The switch is located on the inside front of the scooter just to the right of center and below the handlebars.

3

Twist the key to the left, or counterclockwise, to the position on the switch marked Open. If the scooter is not in the locked position, turn the key to the first Open position. If the scooter is in the locked position, turn the key to the second Open position. In either case, turn the key counterclockwise one notch to the respective Open position. The Yamaha Vino Scooter Owner's Manual cautions you that you should not push down on the key while turning to the Open position.

4

Grasp the end of the seat nearest the front wheel and pull it upward to raise it on the hinges located at the rear. Now you can store or retrieve items from the storage compartment

E bay do universal speedo's usually under £80-100.

the pipes are attached to the engine by allen key hex bolts

http://www.fixya.com/motorcycles/t26842508-quantity_type_fork_oil_125_sachs_city

With your key by nsr foot peg

Please I need a manual of a SACHS 50S for mount my motor, can you help me, Please,. horaciotrindade Best regards.

you decide torque from the nomenclature on the bolt, here is a chart. http://raskcycle.com/techtip/webdoc14.html

when you are holding the carb and looking at the float ther is a little silver pin that goes through the float and two holes on the carb you pull out the pin and be careful not to lose the needle on the float

Hard to diagnose w/o knowing the history. If motor has been sitting for a while, carburetor usually needs a cleaning to give motor enough gas. Also, check gas & air filter.

It's a 32 year old moped designed for about 12-20k of use and to only last a few years. When was the last time it ran? Is the fuel tank, carburetor, and ignition system in good condition? How old is the fuel? Do you have the oil/fuel ratio mixed correctly? How about compression? does the engine have the correct compression. That is a very simple machine, if you have spark, combustion and fuel it will run. If is missing any of those it will not.

Some common causes and potential solutions: Air/Vacuum Leak: If your Harley develops a vacuum leak in its air intake system, the air-fuel mixture becomes too rich. This can cause frequent stall outs, especially after the bike warms up. Vacuum leaks often occur due to dried-out or cracked air intake boots, faulty gaskets, or worn-out carburetor seals. When air escapes from the intake system, the fuel fills the empty space in the combustion chamber, altering the air/fuel ratio and negatively impacting combustion. Severe vacuum leaks can lead to excess fuel flowing into the exhaust system, causing backfiring and stalling while riding. Clogged Fuel Tank Filter/Fuel Injectors: A blocked fuel tank filter (due to coagulated fuel, moisture, dirt, or corrosion) impairs fuel flow, resulting in a lean air/fuel ratio. On fuel-injected Harleys, clogged fuel injectors produce similar symptoms. Regular maintenance, including cleaning and inspecting fuel filters, helps prevent these issues. Faulty Cam Chain Tensioner: A malfunctioning cam chain tensioner can affect engine timing and cause stalling. Regular checks and replacements are essential to avoid this problem. Faulty Cam Position Sensor: The cam position sensor plays a crucial role in ignition timing. If it malfunctions, it can lead to stalling and backfiring. Clogged Air Cleaner: A dirty air cleaner restricts airflow, affecting combustion efficiency. Regularly clean or replace the air filter to prevent this issue. Ignition System Failure: Faulty ignition components (such as spark plugs, ignition coils, or wires) can cause misfires, backfires, and stalling. Inspect and maintain these parts regularly. Compromised Battery Terminal Connection: Poor battery connections can disrupt electrical flow, affecting the ignition system. Ensure clean and secure battery terminals. Remember that diagnosing and addressing these issues may require professional assistance. Regular maintenance and timely repairs can keep your Fat Boy running smoothly on the road.