SOHC.co.uk Forums > CB350/400
CB400F Performance upgrades
AshimotoK0:
Don't want to get into debate about quality but royhall (Roy) showed me the Cruzin intake rubbers on his lovely 350/4 on Sunday ... cracked all over and fairly recently purchased I think.
I pulled some carbs off a CB250G5 that's only done 2k miles and was last run in 1979 at the weekend and they were still nice & soft and no cracking whatsoever. This proves that it must be heat/petrol that hardens the standard Honda ones and that the Cruzin ones are basically not fit for purpose IMHO. Trigger is going to shoot me down over this, I know !!
hairygit:
I agree about aftermarket rubber parts not being worth the hassle. But the big bore kits are certainly okay! (Trigger agrees on those!)
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AshimotoK0:
--- Quote from: hairygit on June 01, 2017, 02:36:58 PM ---I agree about aftermarket rubber parts not being worth the hassle. But the big bore kits are certainly okay! (Trigger agrees on those!)
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--- End quote ---
Is he still buying their rings ;) If you can't engineer a piece of rubber correctly what chance do you have with the complex metallurgy of pistons& rings but I suppose you pays your money and takes your choice. Their carb kits are crap too .. ask RGP750 !
hairygit:
He's not said any different.
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Timmy Nizzle:
So a couple of question to 400/4 owners:
What performance upgrades would you do and in what order to go from stock to maxxed out?
And which of those would you recommend as best bang for the buck?
There is a lot of info online but not in a coherant manner, nor very up to date. I just need a bit of a steer on my reserach I think as I know its not all about buying Yoshi bits to go faster.
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