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Post by buster on Dec 24, 2021 11:03:09 GMT
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Post by johnfcbn44dx on Dec 24, 2021 11:48:32 GMT
The quest is more complicated than I had first imagined, the quest for ultimate power is indeed a challenge worthy of this forum, Sir Pete has stepped up and provided 400 discs and I thank thee, on the subject of brakes, what do I require, a simple swap of the RHS fork bottom or are the mounting points different requiring complete replacement, calipers? complete 400 calipers needed due to differences? A 400 engine has been offered from a CB400T, but again this engine has differences of which I am unsure, I note a difference in valve timing, will this be rectified with a flywheel from a 400n, also a five speed box, be this a problem in thy quest, also the carbs for this engine are again different, can 400n carbs be fitted without problem?
I request all with knowledge on these matters to speak up and bring forth their wisdom, The Great High Lord Beer is most open to the wise words of others who have more knowledge than I. The mounting points on the fork cases, for the calipers are the same geometry for them all. You could just swap out the right fork bottom case, for an NB or later 400 case, but would it not be be better to swap the pair and keep the original 250 ones original? What colour of fork cases do you prefer? Would you go for black, gold, or strip it back to natural and lacquer?
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Post by johnfcbn44dx on Dec 24, 2021 12:24:36 GMT
brakes. they look pretty complete. the fairly common broken bleed nipple though these were fitted to my early model kicker when I bought it and the pads were only making about 50% contact with the discs. I'm not sure if the later discs were different or they mounted differently on the later forks. probably johnf's area of expertise Those are for the later 240mm discs E.G. CB400NC (& the left fits CB125TDC which also had the same disc, though a 2x30 caliper). As you say, they also work on the earlier disc, but the FA69/2 pads bear on the outer portion of the disc. ( I have a temporary twin pot right on my CB400N kicker, to ease moving it by pushing, using one of those NC brackets, and VF500f2 2x30 caliper)
Somewhere here will be the parts for the fork modification, but awaiting the colour choice, and the odd spare I have is a Left, I think there may be still a set in the hut, but the right case would need stud renewal (but it is cold and wet out there today ). For the twin pots I can recommend, the titan classic, slider bush, and if they are 27mm Dia pistons, they have Titanium pistons for £20ish a pop. They also have a full titanium O/H kit now, I think. titanclassics.com/
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Post by buster on Dec 25, 2021 14:26:09 GMT
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Post by The Great High Lord Beer on Dec 25, 2021 17:13:02 GMT
Many thanks for replies chaps, the obligatory family thing is over so I shall be heading into the garage to read your comments more carefully 👍🍺
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Post by The Great High Lord Beer on Dec 25, 2021 17:34:35 GMT
OK, first the brakes, it's good to know only a rhs fork bottom case is required so I'll do that, Sir Pete sent my some discs which measure 240mm, am I to assume calipers of the type Sir Buster has posted will fit and have full pad contact?
With regards to the engine, looking at the specs the only difference I could see was valve timing, 10,35,40,10 on a 400n, and 5,35,40,5 on the 400t, will this make the difference, particularly to power output.
Also carbs, VB21 on the T and VB31 on the N, I have no carbs so will the 31's go straight on, also needing a flywheel and rotor, again will 400n items bolt straight on, oh and a starter, I'm assuming any starter will bolt straight in.
If all the above is good, then the 400T is a goer.
Of course there's probably other things I've not thought of, so all comments and recommendations gratefully received 👍🍺
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Post by BritPete on Dec 25, 2021 18:05:30 GMT
Yes on the discs
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Post by The Great High Lord Beer on Dec 25, 2021 18:17:55 GMT
Thank thee Sir Pete, the first to bring news of joy, keep it coming on the other queries my friends 🙂👍🍺
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Post by BritPete on Dec 25, 2021 18:30:28 GMT
Thank thee Sir Pete, the first to bring news of joy, keep it coming on the other queries my friends 🙂👍🍺 I will post a pic of the NC discs xx and setup tomorrow
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Post by The Great High Lord Beer on Dec 25, 2021 18:33:04 GMT
Well done that man, I shall speak to Prince Comstar and instruct him to award you extra stars 👍🍺
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Post by comstar on Dec 25, 2021 19:02:25 GMT
Well done that man, I shall speak to Prince Comstar and instruct him to award you extra stars 👍🍺 On it - like a car bonnet. 👍🍺
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Post by comstar on Dec 25, 2021 19:04:54 GMT
Pete has been awarded extra stars……and they are ‘seafoam’
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Post by The Great High Lord Beer on Dec 25, 2021 19:08:51 GMT
You should make me a forum admin moderator God like ruler, then I could award all with many stars and suitable titles 😁👍🍺
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Post by buster on Dec 25, 2021 20:04:23 GMT
OK, first the brakes, it's good to know only a rhs fork bottom case is required so I'll do that, Sir Pete sent my some discs which measure 240mm, am I to assume calipers of the type Sir Buster has posted will fit and have full pad contact? With regards to the engine, looking at the specs the only difference I could see was valve timing, 10,35,40,10 on a 400n, and 5,35,40,5 on the 400t, will this make the difference, particularly to power output. Also carbs, VB21 on the T and VB31 on the N, I have no carbs so will the 31's go straight on, also needing a flywheel and rotor, again will 400n items bolt straight on, oh and a starter, I'm assuming any starter will bolt straight in. If all the above is good, then the 400T is a goer. Of course there's probably other things I've not thought of, so all comments and recommendations gratefully received 👍🍺 bloody hell TGHLB, you know how to ask big questions cam timing, your correct (and I didnt know the t's were different) it basically means that theres slightly less duration (valve open for a marginally shorter period of time) so performance will be slightly down, it could also give less at the top end and maybe a sharper feel on the throttle in the midrange, I'd stress that that is just me theorising. possibly the t model stator/mag wheel had an advance curve specific to that cam timing. I'm running a 400t cam with a 450 stator and mag wheel and it seems fine (in fact its the best I'v yet had that bike, I ran out of summer though before I got a proper ride on it). any superdream stator/mag wheel will bolt on to any of the t, SD, nighthawk engines but the 250 set up is denso and the 400/450 set up is hitachi (just to add a bit of confusion the 400a uses a denso setup but with a four cable connection to the cdi). in short any (working) hitachi setup should be fine on a 400 engine. any starter (250/400/450) should be fine VB31's will fit the 400 intake rubbers at the manifold but you'll need to find 400/450/400a rubbers to connect to the airbox, oh and again I'v got 31's on mine and they run it just fine. and if your head hurts after all that, crack another beer
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Post by The Great High Lord Beer on Dec 25, 2021 20:51:44 GMT
Fook me your right, another Beer barman 😄🍺👍
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