Question about 2001 CCM 604 RS Roadster

1 Answer

Oil leak from ccm604 cylinder head

I have the same problem,the bike went into a local dealer 14 months ago,head skimmed by 3 thou and new sealing ring,valves re cut etc,its done 570 miles since and just gone again,as you can imagine they dont really want to know,cost 350 pounds,not sure what to do next i cant keep skimming the head so perhaps break it and give up,any idea on how to stop it leaking please

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An user who is expert in 3 categories / brands.

  • CCM Master
  • 1,190 Answers

Is the barrel surface ok ? if they did the total job then its down to them !! citizen advice people should be able to help also !

Posted on Jan 22, 2014


2 Suggested Answers

  • 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 Mechanic 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 repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 2336 Answers

SOURCE: cylinder head skim

From my understanding, the combustion area of the head should have a diameter that is the same as the cylinder i.e. 56mm. If you took 0.5mm from a standard head, your squish would PROBABLY be Ok, however, you need to measure this. Its quite easy, poke a piece of solder wire in to the cylinder via the spark plug hole and trap it between the piston and the head by gently turning the engine over with the kickstarter by hand. Remove the squashed solder wire and measure with a set of vernier calipers. 0.8mm is about right and as Elf said, anything below this is getting a bit close. Do this for the front, back and left and right of each cylinder. Reducing the squish only has only a moderate effect on the compression ratio and does not require higher octane fule. I did this for mine and it was fine - so you 'should' be Ok.

Posted on Nov 20, 2008

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

Will re torqing the head bolts o na 86 toyota 4x4 with a 4y engine help temporarily with oil in the water ? Im also loosing water but cant see a leak

if the job was done properly , re-torquing the head bolts is not necessary
what is very necessary however is to clean out the stud holes and threads before refitting the head and applying thread lubricant to the stud threads
the problem is when there is oil or water left in the holes before fitting that muck creates a false torque reading
the setting is reached but the head is still loose so re-torquing the studs will sill cause that hydraulic lock situation and the head will still be loose
also all head studs are not always the same length so a stud will bottom out at tension but again the head will be loose
and lastly, head gaskets have a sealant applied that glues the head to the block on operating temperature and that will now be destroyed by the oil and water
all of this is explained in detail in the workshop mmanual

Jul 21, 2016 | 1986 Toyota Hilux 2200

3 Answers

Changed my oil today.When I took the cap off to replace the oil,the cap had some white goo on it.What is this?

Could be a leaking cylinder head gasket or a small crack in the cylinder head. Is the head aluminum? Make and mileage of the vehicle will sometime help as some vehicle makes are notorious for head gasket problems. This allows coolant into the oil and causes this goo on the inside of the cap. Have a trustworthy shop check it out to be sure.

Dec 14, 2014 | Cars & Trucks

1 Answer

2005 Yamaha Enticer 125 dripping oil out of exhaust

Hi, Ryan and the usual suspects are:
1. Engine oil system overfilled.
2. Piston rings worn past service specs.
3. Broken piston rings.
4. Piston pin retaining clip failure.
5. Cracked piston.
6. Broken piston ring lands.
7. Hole in the piston.
8. Valve/guide clearance worn past service specs.
9. Worn out valve seals.
10. Crushed or loose valve seal.
11. Gouges in cylinder walls.
12. Cracked cylinder or head.
13. Blown head gasket.
14. Crankcase breather blocked or hose pinched.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Motorcycle Message Board Motorcycle USA
Oil coming out of exhaust
Yamaha YBR 125 Service Manual
OEM parts for Yamaha
YAMAHA YBR125 Owner Manual

Jul 11, 2017 | Yamaha Motorcycles

1 Answer


if you had a oil leak that is not a reason for a head gasket or skimming the head. now the compression and voluum in the head has changed a lot. all it being a turbo wow :( sorry. those engine leak a lot of oil through the turbo seal

Nov 02, 2012 | Ford Expedition Cars & Trucks

1 Answer

Its a 2000 cadillac deville the oil motor goes to the radiator what can I do

Engine oil going to radiator is a cylinder head problem.
1. Cylinder head gasket burnt
2. Cylinder head bolts not tight enough
3. Cylinder head cracked
4 Cylinder head warped.

Remove cyliner head and pressure test it for cracks. If cracked replace unless someone near you can repair effectively. If not then skim and you might as well do a complete cylinder head service ie valves, stem seals etc. Put back head with new gasket and torque correctly and be surprised with the results.

Sep 13, 2012 | Cars & Trucks

1 Answer

Car blowing white smoke but no overheating has had a new cylinder head a year ago done 54.000

is there any coolant in the oil or oil in the coolant. It sounds like a head or gasket problem. Cooling system & oil system are supposed to be sealed systems. If u have add fluids it must be going somewhere. Leaking, burning etc. Good luck, get it checked out.

Jul 01, 2017 | Daewoo Lanos Cars & Trucks

1 Answer

Hi, My sons 1997 aprilia started to over heat today, took screw out the side to check oil and it was like milk, Can you tel me cause

Hi Paul,

Unfortunately, when oil mixes with water the oil goes milky and indicates that water has got into the oil. This points to the head gasket needing replacing and the head skimming to make it completely flat again.
Depending on how mechanically savvy you are is to how much it is going to cost to fix. A Haynes/Climer manual could talk you through the dismantling and reassembly. Your local Aprilia dealer will provide the head gasket replacement and your Aprlia dealer could point you in the direction of an engineering firm who will skim the head.

First ask you local bike mechanic, how much it will be for them to do the whole job to weigh up whether it's worth you getting your hands dirty.

Good Luck

Jul 02, 2011 | Aprilia FLHRSI Road King Custom...

1 Answer

Bike is at 63000km and has now gone in for 3rd clutch. Am not a hard/sand rider, do not wheelie, etc, etc Bought the bike second hand and first clutch was replaced at 15000 under warrantee. Now at 63000...

If all your clutch problems have been caused by oil leaks, make sure the mechanic working on the bike this time installs all new seals in the transmission and the crankshaft seal on the rear of the engine. Since the input shaft is hollow, you must replace both the seals (on each end) as well as the clutch pushrod felt. Check the clutch slave cylinder too as these have been known to leak.

BMW updated the input shaft seals a while ago, so once you get the new seals CORRECTLY installed your problem should go away.

BTW, was the clutch done at 15,000 by an authorized dealer?? If so, there should be some warranty as BMW gives a two year warranty on repairs done by authorized dealers. If the clutch disc is worn out due to abuse, then that is a different story. Might be wise to investigate if you are entitled to some warranty coverage due to the leaking seals.

Oct 19, 2010 | 2007 BMW R 1200 GS Adventure

1 Answer

My royal star 1996 is burning oil on # 3 cyclinder

What is the compression on the cylinder compared to the other cylinders? It should be within 10%. Some causes can be - as you suggested - the valve stem seals. Also, the sleeve could be rusted, as the valves could have been open on that cylinder. Generally speaking, on a 4-cylinder motor 1 cylinder has both its valves closed, 1 has both open, 1 has an inlet valve open and one has an exhaust valve open at any given time. Another possibility is that the valve could be sticky - try Wynn's Valve Ease or a similar product.

Jun 17, 2009 | 1996 Yamaha Royal Star XVZ 1300 A

Not finding what you are looking for?
2001 CCM 604 RS Roadster Logo

Related Topics:

105 people viewed this question

Ask a Question

Usually answered in minutes!

Top CCM Experts


Level 3 Expert

77201 Answers

Jay Plesset

Level 3 Expert

2833 Answers

Tom Chichester

Level 3 Expert

37979 Answers

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

Answer questions

Manuals & User Guides