Search the Community
Showing results for tags 'bore'.
Found 7 results
-
One of the interesting discussions that has been on here in the past has been the braking ability of the Ventures and the relative effects of items such as swapping caliper/rotor/master cylinders and the benefits of de-linking the first gens. I came across an article on another site which is linked below discussing the ratios between the master cylinder area and the caliper area and the effects on braking. http://www.vintagebrake.com/mastercylinder.htm I created a chart that shows some of various Yamaha bikes and these related calculations for anyone that is interested. There is a screen picture attached as well as the excel spreadsheet if you want to experiment with various combinations. Bottom of chart also shows calculations for de-linking brakes on a 1st gen. Explanation of the numbers shown: Master Cyl dia: The I.D. of the front or rear master cylinder bore Master Cyl. Area: The area of the I.D. of the master cyl. Piston Dia. A: The I.D Of the 1st piston bore or only piston bore in a 2 piston setup Piston Dia. B: The I.D Of the 2nd piston bore, only shown in a 4 piston setup Piston area A: The area of the piston bore of piston A Piston area B: The area of the piston bore of piston B (if used) Total Caliper Piston area: Total area of the pistons in a caliper assembly Rotor Dia.: O.D. of the brake rotor Ratios are expressed as : Piston area/master cyl area:1 (numbers shown in graph do not have the :1 shown. Didn't know how to do that in excel 2003) If you find any errors in this, let me know & I will correct. Gary http://i1007.photobucket.com/albums/af193/gdingy101/ratiospreadsheetpicture3.jpg
-
I obtained a rear brake master from a 99 VMax. Actually got it just for the reservoir. I wanted to see if I could make it work in place of the stock one, minus the level indicator. Got it and a spare starter relay for $31 shipped. So not a bad deal. This thing is in excellent shape, so it got me pondering mounting it on the scooter. Couple of issues, both solvable. The center to center distance of the mounting holes is different, stock looks to be about 52mm & VMax looks to be about 40mm. This seems like it could be fixed with an adapter plate. There is also a c/l offset difference 7 or 8mm. This offset would be beatifically as it would give room to insert the adapter plate. Now question is, should I or shouldn't I . The brakes on the rear could stand a little more grabbing power to them. I have locked the rear wheel by really stomping on them. A little more would be nice, but I don't need an extremely touchy system that will be lock up prone. The bike currently has a 88 master in it which has a bore of 17.46mm. The VMax has a 12.7mm bore, same as RSV. The decrease in bore size would give me more force on the rear pads. It would also decrease the volume of fluid pumped. The brakes have been delinked & it has a quad piston rear caliper. The setup with the VMax master would be equivalent to an RSV setup. Or, would I be better going to a 83-85 rear master, which has a bore dia. of 15.87mm. Or just leaving it be, and hope I am able to ride it this summer. Gary
-
Just wondering if anyone has put a big bore kit in their venture. I have a 2003. Is there a kit for the Ventures? If you have put one in, what has the pre and post install experience been in comparison? Thoughts on should it or shouldn't it be done. Thanks.
-
So my clutch went flat again and after replacing my slave and rebuilding the master again (last rebuild was only 9 months prior) I realized my problem is that the plunger is not returning all the way because it's binding in the bore. Has anyone else experienced this? Can I lightly sand the top part of the bore where it's binding or should I just give up on it and find another? Thanks everyone. Great forum! -
Where do the MKII's get the extra cubes compared to the MKI's? It it a larger bore? Longer stroke? Or both?
-
Jusy thought you (and others) would like to see how that clutch slave cylinder that you donated for the project bike came out. Cleaned it up and honed the bore and ran a tap thru the threads. Polished the piston and buffed out the housing a tad. Reassembled and Viola...
-
The bore and stroke on a 1200 is 76mm X 66mm. What is a 1300? I spent the evening taking the 1300 engine apart that I have had for a long time and it don't look too good. I knew it probably had some rust in the bores because it had been left out in the rain uncovered for a while and it was froze up. I split the case and ended up taking the crank out so I could hammer the pistons to the bottom of the bore and clean the cylinder walls some before knocking them out. It looks like if I am going to use this block I will have to bore it and go with bigger pistons. I really don't think this is what I want to do. RandyA
