johnalpi Posted March 23, 2005 Share Posted March 23, 2005 Hi all. I have, as you may know, a YZF750. I bought some R1 2003 forks to replace my original ones. I have had some shims made up to fit the gap in the bottom yoke. I have the wheel aligned central, the callipers (also R1, blue star type) line up, but I have one big problem: The 320mm discs on my YZF wheel are getting in the way of mounting the callipers on the fork mounts. The callipers are about 10mm away from the mounts. Does anyone know what year R1 has 310mm discs other than 2003, should I be looking for a pre injection model? I have also considered selling the 2003 R1 forks and buying a set of older R1 forks that would take a 320mm disc. Has anyone done this? Has anyone got any suggestions? Thanks for your help ppl, John. Link to comment Share on other sites More sharing options...
solorider Posted March 24, 2005 Share Posted March 24, 2005 why not just go and buy the correct calipers for the forks? it would save a lot of hassle and losing 10mm on the disc size wont make a lot of difference if any,with the correct calipers you may get better brakes Link to comment Share on other sites More sharing options...
johnalpi Posted March 24, 2005 Author Share Posted March 24, 2005 Are you saying 2003 R1 uses 320mm discs, but the callipers from a 2003 R1 have a longer reach than the blue star R1 callipers? If I could find a disc that would fit both YZF750 wheel and R1 callipers I would be happy to loose 10mm, that's not the problem: Is there a difference in disc diameter between 2003 R1 and earlier R1's? If so what are they and what years do the changes appear on? Link to comment Share on other sites More sharing options...
solorider Posted March 24, 2005 Share Posted March 24, 2005 i believe the 2003 models had the gold star calipers,if you notice new models with radial calipers have smaller discs to save on unsprung weight,which is what yamaha probably did on 2003 on models,i dont know what the disc sizes are for each year but if you bought the matching calipers for your forks you shouldnt have any problem selling your blue star calipers Link to comment Share on other sites More sharing options...
solorider Posted March 24, 2005 Share Posted March 24, 2005 on ebay there is some gold star calipers for sale,item7963533977,at the they are going for £71 and he has the matching master cylinder,item7963534402.both have 2days11hours to go Link to comment Share on other sites More sharing options...
honkdawillydahonk Posted March 28, 2005 Share Posted March 28, 2005 Early R1's ran 298mm discs.... In fact all R1's until the very latest one did. If you want to run R1 forks with the YZF wheel why not replace your disc with TRX850 298mm discs - These will bolt straight on. Alternatively you could use a Thunderace front wheel as this retains the speedo drive facility..... Link to comment Share on other sites More sharing options...
johnalpi Posted March 28, 2005 Author Share Posted March 28, 2005 This is great news So I have two options: 1) Use a thunderace wheel, which will allow me to use R1 298mm (what a daft size!) discs and keep the speedo. 2) Use TRX850 discs on my standard YZF wheel and keep the speedo. I now have two things to do a search on eBay for! Hallelujah! Thanks guy's, I'm sure this will help others at some point. Will let you know what happens. John. Link to comment Share on other sites More sharing options...
johnalpi Posted March 28, 2005 Author Share Posted March 28, 2005 Oh BTW I was told by someone at DK Spares that 2003 R1 uses 230mm discs! Thanks m8;) Link to comment Share on other sites More sharing options...
johnalpi Posted March 28, 2005 Author Share Posted March 28, 2005 honkdawillydahonk do you know if the Thundercat use the same wheel as it big brother? Link to comment Share on other sites More sharing options...
honkdawillydahonk Posted March 28, 2005 Share Posted March 28, 2005 honkdawillydahonk do you know if the Thundercat use the same wheel as it big brother? Sorry I'm not sure. Thunderace fronts fit with minimal mods though.... Link to comment Share on other sites More sharing options...
Admin Alex Posted April 5, 2005 Admin Share Posted April 5, 2005 Thinking of disks, my bike jsut failed the mot on my front disks as they are slightly warped!!! Another bargain to buy forgot how much they cost Link to comment Share on other sites More sharing options...
johnalpi Posted April 5, 2005 Author Share Posted April 5, 2005 This may help you: Hi John, A new pair of EBC Prolite discs (carriers and outers) for your '94 YZF750R would be £215, delivered in 2-3 working days. Cheers Vince <[email protected]> He was advertising on ebay. drop him a line. you were using ebc prolites weren't you? And there is the brembo(916/748) option... Link to comment Share on other sites More sharing options...
Admin Alex Posted April 5, 2005 Admin Share Posted April 5, 2005 Hey cheers for that. BUT have spoken to EBC complaining saying that they are only just over a year old and they said to send them back. And they will look at straightening or replacing so fingers crossed otherwise will give him a line Link to comment Share on other sites More sharing options...
johnalpi Posted May 30, 2005 Author Share Posted May 30, 2005 OK! So in the end I've went for the 750 wheel and TRX disc option. I had to shave about 2mm of the inside of where the callipers mate to the fork legs to allow the discs to run through the callipers, I've head this is important I used the original spacer for the left hand side(looking at the front of the bike) had to shave off some of the speedo drive/spacer on the right. Also I made the bottom of the right hand fork the same width as the left. All has been running well for the last 300 miles or so. Other than something is making a groove in the left hand disc. I can hear it digging in when I apply the brake, but the pad (all new EBC discs and pads BTW) is clean from any chunks of metal...... not sure what's going on there, but I'm in the garage again this afternoon with and electrical problem so I might get chance to look at it then. Link to comment Share on other sites More sharing options...
Moderator Beezkneez Posted May 30, 2005 Moderator Share Posted May 30, 2005 pics jon..we want some pics Link to comment Share on other sites More sharing options...
johnalpi Posted June 1, 2005 Author Share Posted June 1, 2005 Pics you say? Spacer in yoke other one I should have taken more off here and less off the spedo drive. I will now I have a spare drive 2mm off each face Speedo drive Original Spacer used Speedo drive Looks like it fits to me Link to comment Share on other sites More sharing options...
johnalpi Posted June 1, 2005 Author Share Posted June 1, 2005 and the last two Link to comment Share on other sites More sharing options...
johnalpi Posted March 31, 2013 Author Share Posted March 31, 2013 Pictures can be found here: http://www.bikepics.com/members/johnalpi/93yzf750/ Link to comment Share on other sites More sharing options...
blackhat250 Posted April 2, 2013 Share Posted April 2, 2013 John " there have been a couple of wars since these were asked for" and another starting soon with korea,,, Link to comment Share on other sites More sharing options...
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