opefully thats a reboring company chamfered the ports - with suzuki theres a 2 step process for the that - stops snagging rings. . Another great update and looking forward to the next expisode - don't forget - better slightly rich than lean (!)
Looks good and why not have a Look for Port and match. PISTON lower Shirt is to wide on both sides but must be wide enough over/wider the Ports ; and a hole e.g. 6mm above the 2 membrane inlet holes and below the rings cooles the piston Head from the inner side of the piston and supports the spray of the 5th transver. Have a Look in the Internet. If you wann to use it upside the road on the track.
I would not worry about port matching the transfer ports if the rest of the motor is 'stock' You will probably find that they are matched fairly well anyway (you know what that Japanese are like!). If you were going to 'port' the rest of the engine and work on the heads then yes you do everything you can to gain BHP but your not doing that, I believe. As others have said, make sure that the ports have been chamfered, if not do it yourself.
@@RepairandRideout I doubt you would get it wrong, you can use a base gasket as a template, its probably just not worth the bother, having said that it will only cost you some 'time' and nothing else, if it makes you happy, go for it!
The primary gear o ring was fitted to the C/D model but not the E/F. Looks from the parts list that it was also on the A&B models as well and I have found them on all the cranks I've had up to the E/F. I've never been able to see why the later models didn't have them. The primary side of all the cranks is the same design. Maybe someone knows?
I don’t know why they fitted those silly o-rings with the block. The early bikes don’t have them. Castellated side of the lip seal faces the bearing to space it away. Remember to check squish as well. Port matching won’t give you any real benefits on an otherwise stock bike but if you have the tools to do it then why not.
Funny you should say that! I have just rebuilt my 250E motor and couldn't find the seal on the exploded parts diagram so I didn't fit one!!! I stipped the engine over a decade ago so can't remeber if it had one or not.......do you think I should put one in anyway to stop the crank swimming in gearbox oil???.....I hope somone see this and can advise!
@@mickmc3250 E parts book doesn’t show it, I assume they went back to the original end web design for the E and F. www.aircooledrdclub.com/manuals/250400E.pdf
I didn't know it was there either. I was looking through the Yambits parts list for the rebuild when I saw it listed. I had no idea what it was so I had to go and check to see that my engine had one. I could just about see it, so I thought I'd better get one! @@mickmc3250
