Recent content by Lester

Thanks to everyone for the replies and please let me say sorry for not specifying the bike info. I subscribed to the first rally of this year and was in such a desperate hurry to find the problem so I could take part - more speed less haste!! Hopefully I have resolved that in my revised...

Hi all, I have been reading through the various queries and answers relating to this but have not found anything that mirrors my situation. Basically, the bike starts first time and runs really well, but for only around 4 kms and cuts out. The first time this happened I rang a friend who...

Hi to everyone, hope you all enjoyed a good Christmas and New Year. I have been busy fabricating a table lift over the past few weeks and am now looking into fixing up the hydraulic piston/ram. For this I found a hydraulic cylinder, with the pump incorporated into the body of the ram...

Hi to all and a big thankyou to the author of this wiring harness guide - it is excellent!! I do have a problem however with the alternator wiring in particular due to all of the wires being the same colour - white. There are 3 wires going from the alternator to the rectifier and they are all...

Hi Guys, I know this has been mooted on a couple of occasions but I need to pursue the possibility of swapping pistons from another Jap motor. I'm thinking that if I can use a standard piston from, say, a 450 Honda having a bore of 70mm, this would be the equivalent of 1mm oversize on the std...

Hi to all, we have had some great weather lately for getting out and about on the bikes but we are quickly approaching winter and I am now looking to find some information relative to the renovation of my newly acquired DOHC model. I thought it would be a simple matter to find information...

Thanks Dean for the quick reply. I thought there may be some number stamped somewhere but it is definitely not on the face of the lock. I have searched with a magnifier under bright light to no avail. It is very possible that the lock has been replaced with an aftermarket piece during its...

Hi Guys, I eventually managed to get my XS250 Special running really well and am still working on the 400SE. I must be a glutton for punishment because I have been given a XS400 dohc in exchange for a decent bottle of whisky. Not sure yet who got the best deal!! I will surely have lots to...

I had thought about resleeving so that I could use the existing pistons but have been told that it is not possible to do this due to the way that the original manufacturing process. Not confirmed by any expert on the subject but he advises that the original sleeves are slotted on the outside of...

Hi guys, this thread interests me a lot as I am in the process of rebuilding my 400 sohc engine (4G5) I am an engineer by trade and would gladly do the machine work necessary to try to make these pistons work. I am finding the cost and availability of the Yamaha units far too expensive to use...

Hi Guys, I found this write up very helpful in the disassembly of my XS250 SE - BUT I counted 21 bolts when I removed them and the manual I found shows only 20. Anyone got any ideas where the 21st bolt goes?? Thanks in advance for any suggestions. Lester

I also am replacing my mains and conrod bearings on my xs250 se and find the table quite confusing. It appears that 3 1 relates to a blue bearing and that 4 2 relates to black. The table from Drewpy simplifies this but I need to ask how you have interpreted this Drewpy? These bearings are not...

:confused::confused::confused: Thanks for the speedy reply Drewpy. Your manual must be completely different to mine. I have read and re-read the procedure in mine and the final stage is to remove the small screw used to hold the spring tensioner in place prior to reassembling in the cam...

Hi all, I am new to the forum though have been lurking for quite some time now building my know how of these bikes. I have not been able to find an answer to my present problem and would like your opinion on the way forward. In brief I have just rebuilt the cylinder head on my 4G5 engine and...