Question about 2008 Beta RR 250 M

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Blown head gasket

What should I be aware of when replacing the head gaskets on the front and rear cylinders on a 1988 RR 250 M? ie. tightening bolts

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Replacing o-rings order of reassembly things to look for compression test, etc.,I'm hoping you have a proper repair manual for the bike - 'cause that's a hefty undertaking you're into. Other than that, I can't help you as I have no experience with these bikes.,,,

Posted on Nov 10, 2008

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Water is mixing into the oil


try tightening down your head bolts if this does not work then take the head off take the bore off and replace the bore and head gaskets and put some gasket sealent on them

May 04, 2012 | 2005 Suzuki RM-Z 250

1 Answer

I have a honda xlr250 1988 model,the problem is there is always leakage between the cylinder head and the block


Remove the cylinder head cover then tighten the four head bolts holding the head and cylinder to the gearbox. Hopefully you will not need to find and install a new cylinder gasket.

Sep 07, 2010 | 1990 Honda XR 250 R

1 Answer

How to install rocker cover gaskets


To replace the rocker box gaskets, you'll have to remove the bolts on top of the rocker boxes to get them off. You may have to remove the fuel tank(s) and seat. You didn't tell me what year and model bike you're working on. Once you have these bolts off, you can replace the gaskets between the center and the upper parts, the inner gasket and the umbrella if your bike is equipped with them.

To replace the gaskets under the lower plate, work with one plate at the time. Remove the spark plugs and jack the rear wheel off the ground. Put the transmission in high gear and bump the engine over until the piston is at top dead center in the cylinder your working on with both vavles closed. Start by removing the three 1/4" hex head bolts and the two 1/4' socket head bolts. Then, remove the 5/16" bolts on the pushrod side of the engine. Tap the rocker shafts out and remove the rocker arms. Remove the other two 5/16" bolts. Lift the lower plate and replace the gaskets. Do not mix up the pushrods. They are usually color coded as to which position they go in.

To reinstall the lower plate, place the rocker box on top of the cylinder and start all bolts except the two 5/16" bolts on the push rod side of the engine. Put the rocker arms in place and push the shafts through them. Start the remaining two bolts. At this point, your lower rocker box plate is "floating" above the cylinder head. Tighten the four large bolts down until they are all flush with the top of the plate. Then, tighten them down 1/4 turn at the time until they are snug. Then, tighten the six smaller bolts down until they are barely snug. Torque the larger bolt to 15-18 foot pounds and the smaller bolts to 10-13 foot pounds. Wait for the tappest to bleed down to where you can turn them by hand to do the other cylinder. Do it the exact same way as you did the first one.

To install the middle and upper plates, put the center gasket and all other gaskets in place and align the plate. Install the socket head bolts in the top and torque to 100 Inch pounds.

Put the transmission in neutral and lower the bike. Reinstall the spark plugs, the tank(s) and the seat.

Good Luck
Steve

Sep 05, 2010 | Harley Davidson XLH Sportster 883...

1 Answer

Head bolts tightening torques??


Auto Decompressor Bolt 104 in·lb
Cylinder Head Cover Bolts 87 in·lb
Cylinder Head Bolts: M10 36 S
M6 104 in·lb S

May 25, 2010 | 1999 kawasaki ZX-6R Ninja

1 Answer

What are the torque specifications for the heads on sporster


You didn't say what year model. Sometimes the heading at the top of these postings are not correct.

For an Evo Sportster, the head bolts must be torqued in a particular sequence. The head bolts are labeled #1, 2, 3, & 4 in the drawings, not literally. The front head bolts are numbered differently from the rear as well.

You torque the bolts in three steps. The first step, you torque the bolts to 7-9 foot pounds. Then you torque them to 12-14 foot pounds. And finally, you mark each bolt and pull it down an additional 1/4 turn. You must torque the bolts in the following sequence.

On the front head, the #1 bolt is the front bolt on the left side of the cylinder head, then the #2 bolt is the left rear bolt, #3 bolt is the right front, and #4 bolt is the right rear as viewed from the top of the head.

On the rear head, the #1 bolt is the bolt at the left rear, #2 bolt is the bolt at left front, #3 bolt is the bolt at right rear, and #4 bolt is the bolt at right front as viewed from the top.

Do not forget to put the O-rings on the dowels when you put the head gasket on and oil the threads of the studs. Make sure you put a new cylinder base gasket on the bottom of each cylinder as well. Once the torque has been taken off the cylinders, the base gaskets will leak unless they are replaced.

On an Ironhead, the head torque is 60-70 foot pounds tightened in a criss-crossed pattern.

Jan 28, 2010 | 2000 Harley Davidson XL 1200 C Sportster...

1 Answer

Blown cylinder head gasket


are you sure the cylinder head gasket has blown and not the rocker cover gasket this is at the top of the engine its rubber if it has it takes just a few 10mm bolts to undo then replace the gasket and no need to time up'.if you have the head gasket blown very rare you should buy a workdhop manual

Nov 03, 2009 | 2008 Honda XR 125 L

1 Answer

Water is coming out of the cylinder head studs


Most likely the head gasket. remove it and make sure the surface on the cylinder and head are flat, and replace the gasket if they are good. Be sure to torque the head bolts and tighten in a criss-cross way. (Inspect the old gasket to verify where it leaked.)

Sep 26, 2009 | 2003 Yamaha YZ 125

1 Answer

What are the torque specifications and sequence for head gasket?


Alternately tighten all bolts until finger tight. As if you are sitting on the bike tighten the front jug top left (short bolt) to 84-108 in-lbs. Then the other short bolt, then the top right (long bolt), then the bottom right bolt. After that then tighten (using the same sequence) to 12-14 ft-lbs. Now place a mark with a grease pencil straight from the bolts out to and onto the cylinder head. Using the same sequence tighten each bolt a 1/4 (90 degrees) more. DO NOT over tighten.
Withe rear jug do exact same thing but with the sequence of right bottom first (short bolt), right top again a short bolt, then left bottom, then left top. Hope this helps.

JP

Jul 07, 2009 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

1999 tt-r250 blowling LOTS of smoke all of a sudden


The seals in the valve guides are going bad or the cylinder head is not down tight > letting oil into the cylinder, or you have a bad head gasket and "O" ring seal. The problem could be any one of the three causes noted above.

Try tightening down the cylinder head. It may fix the problem. If not then the fix is to pull the cylinder head and inspect the head gasket and "O" ring seal if one is present. If the gasket is dirty and oily then replace the gasket & "O" ring. Consider lapping the valves while the head is off. This will give the valve face and valve seat a fresh mating surface thus providing more power.

If the gasket is clean and dry then the shop will need to replace the valve guides. Be sure they also lap the valves.

Please rate this solution. Thanks

Apr 12, 2009 | 2002 Yamaha TT-R 250

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