Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [design]

The act of creating something in principle for a use

21 questions
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3 answers

Why don't all diesel engines have throttle plates?

I learned recently that many older and some newer diesels don't have throttle plates to control airflow. I was also quite shocked to learn about a condition called diesel engine runaway. Apparently a diesel engine can run out of control from oil…
DucatiKiller
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3 rings vs 4 rings pistons: which design is better?

The engine I'm rebuilding (Skoda Estelle/120, 70's, RWD, rear mounted engine) was manufactured with two different pistons, depending the fabrication years: one piston kind has 4 rings and a cut from the oil ring to the bottom, at one side, and has a…
Aram Alvarez
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7
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3 answers

A very simple circuit to supress 12v pulses from illuminating some LEDs

I have recently acquired some Cree LED headlight bulbs for my ageing 5-series. They are amazing enough to actually make the vehicle safe to operate at night. The stock incandescent bulbs were woefully inadequate. Unfortunately, and legal grey areas…
Toby Wilson
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7
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2 answers

Can you recognise this motorcycle?

Can you recognise this motorcycle?
Gabu
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7
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1 answer

What is a "Z" frame?

In the hotrodding world there is a common term I hear called "Z" frame. What does it mean? How do you carry out this modification? Is doing so restricted to certain vehicles?
Jonathan Musso
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5
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Is anyone working on a battery-powered motorcycle (a real one, not a toy)?

Tesla motors made the Roadster and Model S, a small sports car and a sedan respectively, both of which are fully battery powered. They're now working on the Model X, a fully battery-powered SUV. The Nissan Leaf and Chevy Volt are other examples of…
DrZ214
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4
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1 answer

Why are most motorcycles 5 speed than 6 speed?

I have a Honda Trigger motorcycle. I have seen most of the motorcycles even like Karizma ZMR having 5 gears. What would be the reason to have just 5 gears even for 223 cc motorcycles?
Tiny Jaguar
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What is the name of this part? (motorcycle)

What is the name of this part?? I searched exhaust guard but it's not right... I want to buy one for my motorcycle (same model - 2003 Cagiva Planet 125)
Andrei Grigore
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3
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Anything wrong with this custom brake caliper design?

I'm designing a modification to existent brake calipers that doesn't come with parking/hand brake. One method that comes to my mind is to add a lever with a lobe, anchored to the caliper body, that can actuate underneath the pad. The way to let the…
Aram Alvarez
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1 answer

Position of brake calipers different between wheels

I noticed when looking at a Porsche 918 the other day that the brake calipers are not the same position on the front wheels as the rear ones. I then noticed that they are laid out the same on a BMW M3. I thought that potentially this was something…
James Monger
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3
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What is the area in front of a car where brand logo is held called?

I have seen the design of so many cars out there specially there front panel where logo is rested, it really looks eye catching. What do we call that panel in automotive terms ?
nraina
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Advantage of criss-crossed U-bolts

This spare tire trailer mount (Thule) has crisscrossed U-bolts: I would have thought regular U-bolts, arranged vertically, would have been adequate for holding a spare wheel bracket to a trailer frame. Using specialized/crossing U-bolts would have…
User1974
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What causes imbalance in vapor seen between dual exhaust tail pipes?

I noticed that most vehicles in the Winter do not have the same amount of vapor coming out of both exhaust pipes. I understand that some exhausts are not true duel exhaust therefore presume that this question applies only to true duel exhaust…
user22295
2
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1 answer

What is the reason for this flimsy scooter engine cover?

Hello mechanics and enthusiast. My question is a bit hard to explain and visualize so I added a photo: This is an image of Honda Beat's rear. I came upon this question while I was cleaning it this morning. My question is, what is the purpose of…
bikernix
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Things to Consider While Installing a Radiator

I have been using a KTM Duke 390 engine in my formula car. The engine is overheating, so I thought of using a twin parallel type radiator setup. What are the points to be considered before I set the radiators in this fashion?
srijan acharya
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