Question about Honda Unicorn Motorcycles

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How can i make an engine for a bike or car? I want to become a mechanical engineer.

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First try to repair an existing one. Learn form the experience to got there.
TRY to make some variations to that. By that time u have good knowledge on engine

Posted on Jul 31, 2010


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Posted on Jan 02, 2017


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1 Answer

Bike starts fine but when I put it in gear it dies. what do I adjust or check?

Im gonna go out on a limb and think the clutch is either out of adjustment, or the springs are weak. This is coming from a small engine mechanic, not a bike mechanic, but systems are systems, car, bike, mower, they're all the same, just tailored for each purpose and machine.

Mar 21, 2017 | Motorcycles

1 Answer

Wrist pin

The pin could have been broken and the engine still running. as long as the pin was held in place. When something goes wrong in an engine, the problem can quickly get worse. And cause something else.

Jun 08, 2013 | kawasaki Motorcycles

1 Answer

Coolant leaking from R1 bottom of engine

FYI This has just happened to me.
Bike has been stood for a few weeks and i started it. Noticed the temp was unusually high (105-110) so switched off, checked coolant and it was dry.
I topped up and noticed the coolant leaking from what appears to be a hole in the engine sump casing.
Im a fairly fast worker and i managed to remove the entire exhaust system down to the header pipes and drop the oil and remove the sump casing in around an hour.
It might take longer if you don't do much mechanical stuff. (I'm just a hobbyist btw not a mechanic).
It turns out that the hole in the sump casing is actually linked to a coolant overflow pipe internally. So don't worry coolant is NOT mixing with your oil (and therefore oil is NOT mixing with your coolant!)
So obviously there is something more to this than meets the eye.It turns out that on all Pre2006 R1's the Water Pump is internal and if it leaks, You guessed it, It used this overflow pipe to stop the coolant mixing with your oil.
This is where my mechanical knowledge ends and i will be taking my bike to a real mechanic to swap out the water pump for me.
The good thing is, if you already remove your exhaust system and drop all your oil etc this will save around 1-2hours of labour at the garage!When they've fixed, get them to replace the oil and filter and leave them your exhaust if you like to fit and they can run it up and test it before returning to you working:)
Samantha x

May 17, 2012 | Yamaha YZF-R1 Motorcycles

1 Answer

I went down 2yrs ago and now I tried starting the bike the engine wont turn over

the bike engine has become cold.ask someone to push from behind while you sit and try kick-starting this for several times.if you have failed and want to end up then go to any mechanic.i think this will work.

Apr 28, 2012 | 2007 Honda CBR 1000 RR Fireblade

1 Answer

No second gear


The 2nd gear lockout is, a mechanical speed sensing mechanism. It doesn't care if the engine is running. You bypass it by scooting the bike forward, about 5-6 mph, while shifting the transmission into 2nd gear.

Stand on the left side of the bike, with the ignition "ON" and the transmission in neutral.
3 With your right foot on the ground, behind your left foot: place your left foot on the left foot peg, with your toe under the shifter; squeeze in the clutch.
*4.Scoot the bike forward about 5-6 mph, with your right foot, and shift the transmission into 2nd gear, with your left foot. If you accidentally go into 3rd, or some higher gear, you can easily shift back down into 2nd, without further movement of the bike.
5.To start the bike: Apply the choke if the engine is cold. Squeeze in the clutch and push the bike forward, both feet on the ground, about 8-12 mph. Release the clutch until the engine start
As soon as the engine starts: squeeze in the clutch and shift the bike into neutral.

Apr 23, 2011 | Suzuki GSX 750 EF Motorcycles

2 Answers

My 2004 kx 250f is leaking oil from where the shift lever and gear box meet, how can this be fixed and why might it be leaking?

hi, is this from around the shaft? if so a seal is fitted to this, it is easily replaced by removing the gearchange lever, und using a small sharp pick to push between the shaft and the seal, with not much effort you can pull the old one out,clean around the shaft and seal area and gently push the new 1 in useing even force all round, TIP IF YOU LAY THE BIKE DOWN ON ITS RIGHT SIDE YOU CAN REPLACE THE SEAL WITHOUT REMOVING THE OIL.

Jan 18, 2011 | 2004 kawasaki KX 250 F

1 Answer

I'm looking at getting a 1979 Honda CX 500 to fix up and keep myself out of trouble. I have done a little work on bikes and a little riding, but would definitely consider myself a beginner in both...

hi, had many a good time on a cx 500, realy easy to ride with or without a pilion, for the rite money they are a good bike,

as the bike is now 32 years old be careful you can still get parts for it, in the early days the bike did have some issues these included

crankshaft bearing failure,, engine removal required
camshaft failure engine removal required
timeing chain and tensioner guide failure, engine removal rear cover removal
waterpump seal failure, can be repaired in frame
mechanical cooling fan failure, repaired in frame
alternator failure, engine removal,

the engine itself is overhead valve as this incorperates a cam chain and the camshaft is below the cylinder head in the middle of the engine, it uses pushrods to open and close the valves, these may become rattely after high milage but there is no cause for concern,
a noise from the front of the engine may well be the cooling fan, when faulty they make a hovering sound,, the center is alloy inside of a plastic fan, this becomes look out also for radiator damage,
on the odd ocasion it was reported to have gearbox problems, ride the bike check for smooth gearchanges, with no noise throughout any gear, ride the bike slow as well as higher speeds and get a good feel for the ride, as the cooling fan is mechanical you can alow the bike to idle without the posibility of overheating, so do this and check all is well before you comit to buying, it is normal to feel a slight tilt in the bike as you blip the throttle from tickover, as the fan is mechaical combined with thev twin engine, hope this helps you paul

workshop manual availible if required

Jan 17, 2011 | 1979 Honda CX 500 A

3 Answers

Possible blown head gasket

My friend, a motorcycle is not a Toyota pick up. Don't even try to fix it at this point of your motorcycle career.

By nature, air cooled engines have a wider range of normal operating temperatures. Even if your bike has a radiator, it is still more motorcycle engine than automotive engine.

Since this is your first bike, I recommend two things for you. First, seek out a Motorcycle Safety Training Course, such as the BRC from the Motorcycle Safety Foundation. Yea yea, I know, you know how to ride and maybe you do. If you take the course, you may get some good tips and probably a discount on your insurance. Second, take your bike to the Suzuki dealer and have them go over the bike mechanically for you to make sure all is up to snuff on your 11 year old bike. Get a tune up and ask the mechanic about your bike. What to lube, where the oil goes etc. You should become very good friends with your new motorcycle - believe me when I say - it is a far cry from driving any other kind of vehicle.

Your investment of $ and time spent with the mechanic and your BRC instructor will pay dividends for many years to come. Good riding to you my friend. Enjoy your new motorcycle and ride safe.

Thanks for your interest in

Feb 19, 2010 | 1998 Suzuki GSX-R 750 W

1 Answer

Sir, I own a Passion plus Bike 1996 make. 1.What would be the reason If I experience chain sounds-Usually while changing gears? 2.some sort of Shaking Rings noise from Engine , was it really mean that the...

The transmission consists chain sprocket assembly, with the smaller sprocket on the engine & a larger one at the rear wheel. The chain stretches and the sprocket teeh keeps getting worn whenever you accellerate or use the engine as a brake to slow down. This play can increase up to 2 inch,. thus on lower gear, higher mechanical advantage, looses since the sprocket of the engine transfers power after that play/gap/time required to tranfer the same power to the rear sprocket result of metal on metal hammer.
Tighten chain at regular intervals and change the chain sprocket if its still the original one. If the bike runs 50+ km in a day and/or at high speed, change the engine oil every 500 to 750 km running i.e. once a month. Whichever comes first. The oil becomes darker & looses it's viscocity(thin). Also after covering so many kms, if the engine oil had been low for that period & running at a good speed you might require a change of piston rings( 1 oversize) and then filed to fit without jamming the piston.........sodeep

Oct 27, 2009 | 2006 Hero Honda Passion Plus

2 Answers

Engine knocking problem,no start even with kick,kick becomes free

yea it sounds like the compression is down could be the rings or barrel wear or leaking head worst is lower end bearing this is most probable due to the banging noise think engine needs overhaul by a good mechanic

Jan 13, 2009 | 2005 Honda Unicorn

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