Question about 2005 Honda Unicorn

2 Answers

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

Bike runs good but sometimes it does not start and kick becomes free.i find problem in overtaking. bike begins to knock. mechanic are not able to detect. iam very worried. please help me. clutch plate are well in condition. mechanics are predecting that there could be problem in head of the engine.

Posted by on

  • Anonymous Mar 22, 2014

    My timing chain became noisy after the bike sat for 6 months, prior to storage it was not noisy. Will this self adjust if I ride until the engine becomes hot. I've been worried that the timing chain may break or come off the cog if I ride it.



2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

This was the same problem what I had with my New Unicorn. I approached the Service Center through Honda customer care, and now got a solution which is not bad. I could meet with a senior service manager and technician there and they really supported me solving this problem. I will brief out the findings and solution here:
Findings:-Engine heating up than normal, Exhaust valve misbehaves at this extreme condition. Air block is happening at the time of exhaust stroke inside the engine.
Solution:-Engine was overheating than normal because of bad/changed valve clearance and improper oil pumping inside the engine. They corrected valve clearance for now and replaced entire oil pump unit inside engine. Replaced rubber mounts on top of both valves. Replaced the clutch lift plate because of bent formed after trying so many kick starts while piston movement was interrupted due to air block.

Posted on Mar 07, 2009

  • meharo Mar 07, 2009

    I forgot to mention the exact symptoms of the problem for which I written a solution.
    1.A sudden engine stop and jump-start while running it very smoothly.
    2.It happens usually after or during long drives.
    3. It suddenly appears when you give a sudden throttle open or continuous throttle open for a short period of time.
    4. No knocking sound for me but engine is producing a little hard beat than its normal smooth beat.
    5. Feels a little more friction also while releasing clutch from engine.
    6. Once engine stopped your self will try to start the engine, but no real engine fire.
    7. Kicker is of no use, its free, you can push it down using even your finger.


  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 104 Answers

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

Posted on Jan 19, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Sometimes when i overtake there is no power when i twist the throttle, then it kicks in with a jump

Look at your fuel pressure - make sure that you have good CLEAN GAS in the bike, this is usually a fuel pump issue.

Jul 09, 2011 | 2008 Buell Lightning CityX XB9SX

1 Answer

I have a knock when the bike gets hot checked the valves they are good can i tighten the timing chain and if so how

Have no idea what the bike is except its a HONDA so hard to give accurate answers! in most newer bike the cam chains would be auto tensioned so depending on what your bike is possibly could tighten it manually but unlikely
if the bike is old ?? then the cam chain can become over stretched and still slap about no matter how it is tensioned
also likely knock cause would be piston slap which occurs when the piston and cylinder gets bit old in the tooth
I would need to know age of the bike but more importantly what model of the bike as us mechanics at least need to know if has 1 cylinder or 4 cylinders to help you guys

Jun 03, 2011 | Honda CRF 150 F Motorcycles

1 Answer

Have 350 dirt bike kick start was ok left bike shed for a while used kickstart ok but next time it appears jammed wont move tried rocking in gear to free up but no go. Do you have an idea as to what might...

Assuming the engine will turn over, the ratcheting assembly on the kick starter may be worn. Remove the kick start lever and then the side cover, (place a pan under the bike to catch any oil). The kick starter is basically just a gear and a spring; the gear will in some manner engage the flywheel, (sometimes indirectly). Make sure there is nothing obvious wrong such as broken teeth or debris lodged in the mechanism.

The other possibility if the engine does not move when rolled is the timing chain may have jumped teeth on the cam sprocket. To get to this remove the gas tank, remove all but the rear engine mounting bolts, remove the valve cover. To check remove the fly wheel cover set the piston to Top Dead center, (TDC) on the compression stroke and make sure the mark on the cam sprocket is at the top of the sprocket and not off set.

Good luck.

Apr 01, 2010 | 1972 Honda CB 350 F0

1 Answer

When trying to start my V Star 1100 2004 it kick into the starter on each turn especialy when cold. When running, it run good but sometime it misfire up to the point that it stoped the engine once.


Oct 21, 2009 | 2006 Yamaha V Star 1100 Custom

2 Answers

Yz450f that quit running

Yes, it does have an automatic decompression mechanism. It is a centrifugally operated mechanism and it is EXTREMELY unlikely that is causing your problems.
The two highest probabilities are:
1. Fouled spark plug. Forget what it looks like, put a BRAND NEW plug in. It is the cheapest form of diagnosis you can do. These bikes are terrible about fouling spark plugs and a fouled plug produces the exact symptoms you described.
2. Inspect your valve clearance. Tight valves will also make the bike hard/impossible to start with the kick starter. In some cases, it can be push started, but still won't kick. With tight valves, the bike, although hard starting, will run pretty good, for awhile. Eventually it will burn the valves and quit running though.
If your bike isn't kick starting fairly easily, something is wrong and needs to be addressed. The only other issue is making sure the idle speed is set per the service manual. These bikes have a fairly high idle, some as high as 1700 rpms. If it is set too low, it makes them hard to start too.

Sep 11, 2009 | 2004 Yamaha YZ 450 F

2 Answers

After starting my Roadstar in neutral, as soon as I put it in gear, it dies. It reacts to the shift, not the clutch. Is it electrical? Mechanical? I need help troubleshooting. thanks.

With the engine off, put it in gear and pull the clutch lever. If the bike rocks freely back and forth, the clutch is releasing correctly and eliminates mechanical problems. The only possible electrical problem would be a wiring fault involving a gear position indicator (if the bike has such a thing). If it does have such an indicator, find the switch (on either side of the transmission case) and disconnect the wiring (plug?) Try the bike again. If it now keeps running, I'd suspect some form of cross wiring short within the wiring harness. If it does not run at all, then the bike probably won't start and run except in neutral--hook up the switch again. Did this problem start suddenly, or after a repair of some sort???

Aug 15, 2009 | Yamaha Road Star Motorcycles

1 Answer

I have honda unicorn-2005 model. Sometimes kick become free and i am unable to start it. Then i have drive the bike manually in first gear and start it by releasing clutch at substantial speed

first check about the clutch plate, if it is down or not? if it is good then check for the valve of the engine. it need replacement.

Jul 12, 2009 | 2005 Honda Unicorn

1 Answer

My 2002 pontiac montana is making a knocking noise. I thought maybe it might have something to do with the oil but i really don't know? can u help me. you can here it when u start driving and sometimes...

Knocking can be a symptom of worn engine bearings, a worn wristpin on a piston or piston "slap" Engine bearing problems cause low oil pressure and are serious. Lifters can also become noisy from an internal malfunction or wear, sometimes they can become noisy with low oil pressure which is related to either bearing problems or an obstructed oil pump screen. Servicing the lifters in that case will not fix the problem.
One other cause of knocking is a cracked flywheel (cracks usually are between crankshaft bolt holes and require trans removal to actually see the damage)
Diagnosis begins with removal of the oil pressure sending unit replacing it with a mechanical gauge so actual oil pressure can be determined. This, along with the ear of an experienced technician will make the diagnosis complete. Obviously, the repair depends upon the tech's findings.

Jun 12, 2009 | 2002 Pontiac Montana

1 Answer

Engine knocking problem of Honda Unicorn 2005 make

I too have a similar problem. I couldnt find any solution. If you have found it please let me know.

Mar 28, 2009 | 2005 Honda Unicorn

1 Answer

Hard to start yz250 dirt bike 2001 4stroke

i used to own a yz426f and it had the exact problem... a fresh plug will fix your problem. change the plug and the bike will run great. also don't start the bike and shut it off , my bike would be fine if i started it and rode for a while getting to the proper heat range help save the plug. if my bike didn't start in one or two kicks it was usually the plug.

hope this helps

Mar 10, 2009 | 2003 Yamaha YZ 250 F

Not finding what you are looking for?
2005 Honda Unicorn Logo

760 people viewed this question

Ask a Question

Usually answered in minutes!

Top Honda Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4825 Answers


Level 3 Expert

79186 Answers


Level 2 Expert

342 Answers

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides