Question about 2005 kawasaki KX 250

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Will a 2 stroke run without the exaust valve in it?

Barrel is good as lucky i was stopped when it happened or the whole top end would have flown to pieces.

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Yes and no Yes it will run with the power valve out but it will be a dog.

Posted on Jan 31, 2009

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Just put in s new top end a yz 85 2008 , wouldnt start but could if it was bump started and ran bad. Opened her up again and there was marks all over the piston, help??

When fitting a new top end you may have broken the piston rings. On a Two Stroke engine the rings have a gap which must not enter any ports. To prevent this the slot for the rings has a metal peg to hold the ring gap in one place.
On Four Stroke engines there is no ring peg as there are no ports.
If a ring breaks whilst being fitted the broken parts will enter a port and then be dragged up and down the barrel causing damage to piston and barrel. The broken parts one having made their way to the top of the piston will be crushed between the cylinder head and the piston damaging both. The cyl head can be re used but the piston is most likely ruined.


Oct 03, 2013 | Motorcycles

1 Answer

2003 r6 stalls when coming to a stop or when i pull clutch in any one know what the fix is

This problem affects all bikes the reason the bike stalls out when idling low or when the clutch is pulled in is because of Fuel/Air/Combustion ....

Wrong reasons

1. If it was the spark plugs the bike would run rough in all gears all the time

2. IF it was Fuel pump you would notice poor performance in all gears and sometimes the bike will not start depending if the pump is punched.

3. GUYS! It's not the kick stand, I see this answer all the time (makes me laugh)

4. It is not sensor issue ether because well if sensor is bad whole thing will not work

5. It is not the clutch cable, because the stall happens then clutch is engaged


Throttle bodies / VALVES need to be adjusted and synchronized (BY Professional) Do not attempt to do yourself involves opening cam cover and messing with Springs/Valves

Explained what is happening inside your engine/heads

---- Your bike is so many years old and has say 20,000km on it...depending how hard the bike has been ridden in its life this may have to be done sooner... Your Valve operates on Rockers and Springs inside the Cylinder Head... Over time the springs become less springy this requires Shimming of sprigs or if you are lucky (price) simple screw adjustment... As you ride the valves are not closing all the way, you do not feel this because you are traveling at high enough RPM to keep the engine going soon as you engage the clutch it Revs down to 1750RPM, and now that the Valves are not closed properly the combustion stops happening...Simply put your engine chokes its self out


1 BACK FIRE OF EXAUST (WHILE IN HI RPM) Sounds cool but not good for engine

2 CLICKING IN ENGINE - Almost sounds Valves are running with no oil (listen close you will hear)

3 NO TORQUE/HORSE POWER- When in good shape power wheelie is achievable at 5000-6000 RPM (on a 600cc)

This must be done for the following

Yamaha YZF R6 - 24,000km

Honda, Suzuki, Kawasaki ----Not sure (I know for fact it's less 16,000ish)

Feb 16, 2011 | 2004 Yamaha YZF-R6

1 Answer

Oil comes out the crank case breather tube engine runs good no exaust smoke oil is on full mark whats my problem?


Sep 09, 2010 | 2005 kawasaki KLX 110

1 Answer

How to install the piston properly

both 2 and 4 stroke motor pistons will have and arrow on the piston, this points to the exhaust port,2 strokes have locating pins for the rings and the end of the rings go to these pins,as you will not be able to get back into the barrel if not fitted like this. 4 stroke rings are posistioned at 120 degree intervals to each other so the end gaps dont line up and there will be numbers stamped on the top and scraper rings which you face up.

Aug 31, 2010 | Suzuki RM 125 Motorcycles

1 Answer

Describe the differance between two stroke and four stroke engines

two strokes fire every time the piston gets to the top ( every two strokes of the piston, down, up)and the fuel in and exhaust out is controlled by holes in the barrel called ports, they need oil mixed with the petrol to lubricate the piston and engine bearings.

Four stokes fire every second time the piston gets to the top( or every fouth stroke of the piston, down, up down ,up) the fuel and exhaust are controlled by valves that are pushed open by the cam, oil is pumped from the sump to the top of the motor and to the bearings for lubrication

May 19, 2010 | Motorcycles

1 Answer

What is the oil mixture ratio for a 2005 Kawasaki kx250?

hi,most two strokes in the mx range run about 40-1,but me being me i always prefer to run my 2 strokes a little bit oily around 33 or 35 -1,2 stroke oil is very cheap compared to scored barrels or seized big ends...cheers

Apr 04, 2010 | 2005 kawasaki KX 250

1 Answer

How petrol is going in engine from tank and how it

air and petrol mix in caburater cause of sucking pressure by the piston when intake stroke (intake valve remain open) then the piston move up to tdc(top dead center) that call compression stroke (at this time both valve remain closed) and just before the piston reach the tdc the plug stat to ignite and the detonation is the power stroke and push down the piston and the piston come up again as the exaust stroke. that is a little bit information

Mar 28, 2010 | 2000 Bajaj Chetak 150

1 Answer

I left my 2003 honda in the rain and you can not even kick start it. it is froze up. what do i need to do to get it unfroze.

a top end rebuild the insdie has obviously rusted up strip the top end (barrel+head)inspect any parts that are rusty and replcaing them if it is realy bad inside i would replace engine as its probably cheaper use a manual to strip it down as its very difficult to deal with these 4 strokes as you have valves etc in top unlike stroke

Aug 31, 2009 | 2003 Honda CRF 150 F

1 Answer

Fitting cam chain after replacing piston/rings.

Here's the deal > the chain position on the crankshaft cog makes no difference. No timing is done on that end. The timing is done when mounting the chain on the OHC. Run the piston up to TDC. Put the cam in a position where the cam lobes are pointing downward. Look at the cam gear. There should be two marks on one side of the gear. You should be able to see the marks from the left side of the engine. The cam is in time when the marks are parallel with the top gasket surface of the head and the gear is bolted to the cam. Now you have TDC compression stroke (good). If the cam lobes were pointing upward you would have TDC exhaust stroke (bad). Just to help you a bit in the future, I have a web site below where you can see a parts fitch for your specific bike.

You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.

Post a comment if you need to get back to me.
Please top rate this solution. Thanks!

Jun 06, 2009 | 2002 Honda XR 200

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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