Mikuni Carb Adjustment Manual' title='Mikuni Carb Adjustment Manual' />Great article, I love the symptoms charts. I am trying to revive a bone stock 1984 Kawasaki GPz 550. The jets are correct per the shop manual. Mikuni Carb Adjustment Manual' title='Mikuni Carb Adjustment Manual' />Vintage Performance Developments Performance products for vintage street and track cars. SquishQuench distance, compression ratio, deck height and head gasket thickness. Question from Jean Pierre on head gasket thickness, deck height and compression ratio. The engine is B2. B with a 2. 13. 0cc upgrade from IPD. Yamaha XJ600 Diversion specs and information including model specifications and prices, servicing and oil change intervals with fork and brake fitments. Throttle%20Valve%20Opening%20Diagram.jpg' alt='Mikuni Carb Adjustment Manual' title='Mikuni Carb Adjustment Manual' />The deck height is stock as well as the stroke. I used a thicker gasket from IPD as the thing pinged like mad before it. Now the one thing to keep in mind is that in California we only have 9. Answer. For the head and compression ratio its important to know exactly what the deck height is. Stock deck heights varied widely from as little as. Further your engine is no longer stock as it has been rebuilt at least once. The proper way to do this is to set the deck height at the time of a rebuild as its normal practice to mill the top of the block at least to make sure that its flat at the time it is machined. So we will need an actual measurement of the deck height before the head is finished and we should have an actual bore measurement at the same time. One of the worst things that you can do for engine efficiency is to use a thick head gasket. All engines are designed with a squish or quench area a flat area on the head outside of the combustion chamber. This flat surface is designed to be a certain distance from the top of the piston at top dead center the squish or quench distance. The purpose of this area is to create turbulence in the combustion chamber which promotes among other things a complete burn of the gas mixture. It also makes the engine less prone to pinging detonation. When you put in a thicker head gasket,  enlarging the distance from the squish area on the head to the top of the piston, you reduce the squish action that creates the turbulence and makes the engine more prone to detonation. Log Based Recovery In Dbms Pdf. For a B2. So with a. So the proper way to do this is to mill the block to close to zero deck height and then set the compression ratio by milling the head to increase it or enlarging the combustion chamber to decrease it. Question what oil should I use I have included here a question from the Mobil Oil website and their answer, followed by my comments. Question Does Mobil 1 Contain the Additive for Flat Tappet CamsI build a few engines a year as I do muscle car repairs and I have been having a lot of camshaft failures. I just read that it is because the oil no longer has the additive for flat tappet cams. Can I use Mobil 1 to break in fresh rebuilt engines of 6. Is it too slippery for new ring break in Will it give protection on new cam and lifters  Frederick Neidlinger, DoverDover AFB, DEAnswer For older, flat tappet engines where wear may be more of a concern, we offer a number of oil products which are higher in phosphorus than API SMILSAC GF 4 oils. These include Mobil 1 1. W 5. 0 1,2. 00 ppm, Mobil 1 0. W 4. 0 1,0. 00 ppm and Mobil 1 High Mileage 5. W 3. 0, 1. 0W 3. W 4. For all newer engines and flat tappet engines in normal service, API SMISLAC GF 4 oils are preferred for better fuel economy and for the protection of catalytic systems with lower phosphorous 8. See details on our chart http www. USA EnglishMotor. OilFilesMobil1ProductGuide. In general newer oils labled SM and SN, in order to meet those standards have smaller amounts of the zinc and phosporus additives that were in SL and older rated oils designed for older flat tappetlifter engines. We strongly recommend using oils that have the olderhigher levels of these components in all of our engines. For break in, even higher levels may be beneficial and we use break in additives, such as Lucas break in additive. We also use a petroleum based oil for break in, on the theory that the rings will seat better and faster with an oil that is less slippery than the synthetic oils. We also change the oil once or twice during the first couple hundred miles, and this can get expensive with synthetic oils. For many years we have used Mobil 1 1. W 5. 0 in our race engines. These engines have been designed for use with multi grade oils. We do not recommend the use of straight 5. Mobil 1 High Mileage 5. W 3. 0, 1. 0W 3. W 4. April 2. PPM. 391. Question Which head gasket to use. John, I just want the best gasket, Cometic or ElringVolvo,  in  the thickness application you recommend for your head engine. Richard,The confusion as to why we use different brands of gaskets for different engines is base on the fact that  certain sizes are available from one manufacturer, and other sizes from the other. Cometic  . 0. 34, ElringVolvo. We chose the gasket based on the size we need or is best, closest to what we want, and that usually determines the manufacturer. In your case the bore is not an issue as we can get the right bore from either. For larger bores we have to go with the Cometic gasket because we can get them in 9. So the issue is thickness and setting up the proper quenchsquish distance. This is the compressed gasket thickness plus the deck height and is critical for efficient combustion. Minimum would be. We normally want a little more on a street engine using stock rods. Ideal is between. From. 0. 35. 0. Over. Its all about optimising the engine and a few thou here and a few thou there all add up to improvements if they go in the right direction, worse performance if they go in the wrong direction. So if you have at least. Next choice, and good if you want more clearance, would be the. Elring. All problems with head gaskets in these engines are due to overheating the engine andor improper installation. Regards,John. Vintage Performance Developments  52. Question  valve adjustment. Monday, May 2. 4, 2. PMSubject Re Volvo Engine. Sorry this is probably a dumb question but I should adjust both valves to. TDC for each cylinder. Right Answer Much better to do it this way Nines methodWith valves numbered from front to back. Roll engine until 8 valve is fully open, adjust valve 1. Roll engine until 7 valve is fully open, adjust valve 2. Roll engine until 6 valve is fully open, adjust valve 3. Repeat until all 8 have been adjusted. The of the open valve plus the of the adjusted valve always add up to 9. Question Engine Break in. Hi John,Bruce Prior here. You built me a 2. I now have installed and got started the other day. I need to know what to torque the heads to and what to adjust the valves to. Are they the regular settings in a manualAlso, you said you would give me break in instructions. Anything else you can tell me would be great. Thanks. Bruce Answer First and most important   do not run the engine under 2. Run it from 2. 00. Shell Rotella T 1. Retorque the head to 7. Use a cam break in additive such as from Lucas Oil or Comp Cams. Drive normally for first several hundred miles, but avoid long stretches of highway driving where the rpms will remain steady. Mild to moderate acceleration is good for breakin. Very high or very low rpms for extended periods of time are bad. After 5. Mobil One 1.