sharkbait Posted February 7, 2012 Report Share Posted February 7, 2012 (edited) Thinking of swapping the old PHBH for a PHBL on my 315. Am I right in saying that the PHBL airbox and inlet manifold rubbers are different sizes to the PHBH? If so do they need replacing or can the PHBL be made to fit the existing rubbers? Edited February 7, 2012 by sharkbait Quote Link to comment Share on other sites More sharing options...
nelly1 Posted February 7, 2012 Report Share Posted February 7, 2012 hi mate im pretty sure they are the same size im sure someone else on here will know for sure Quote Link to comment Share on other sites More sharing options...
psla Posted February 8, 2012 Report Share Posted February 8, 2012 they are not the same size, the connection sizes are different PHBH available in 26mm or 28mm 36mm elastic connection to engine Quote Link to comment Share on other sites More sharing options...
sharkbait Posted February 8, 2012 Author Report Share Posted February 8, 2012 (edited) they are not the same size, the connection sizes are different PHBH available in 26mm or 28mm 36mm elastic connection to engine 42mm connection for trumpet/air filter attachment. PHBL available in 26mm, not in 28mm 31mm elastic connection to engine 38mm connection for trumpet/air filter attachment. apart from the connection sizes, the construction is equal. greetings Peter Hi Peter, Yes I found that out today!! So my decision now is how best to fit the PHBL. I'd much rather not have to buy new rubbers so I need the best way to make up the 5mm difference in sizes. So far I've given the carb a really good clean and put it back together - it was filthy. As a temporary measure I've wrapped some tape around the inlet and outlet then added two layers of inner tube to give a rubber-rubber seal. It seems to be working OK at the moment with the existing rubbers but ideally I'd like to source a couple of bits of rubber that I could use to sleeve the connections, so 31mm inside diameter x 2.5mm thick for the carb outlet and 38mm x 2.5mm thick for the inlet. I was also thinking of using self-amalgamating tape as this is quite thick, sticks really well and has a rubbery texture. The bike seems to be running better with the phbl on even though I've not even looked at the jetting yet - it's currently got a 108 main and 36 idle jet, not sure how these compare to the recommended jets. Only potential issue is the slide which seems to have a bit of wear on it, how important would this be? Edited February 8, 2012 by sharkbait Quote Link to comment Share on other sites More sharing options...
nelly1 Posted February 8, 2012 Report Share Posted February 8, 2012 lucky nobody listens to me Quote Link to comment Share on other sites More sharing options...
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