As per Mack's advice in the mini tutorial forum, I'm starting a new thread.
I've not even ridden my MSO 140SR yet. Well not properly ridden it on a track. Too wet! But I've fully assembled it and thinking about some (future) simple engine mods for more a little more throttle response and other gains.
So my questions for Mack or anyone else ...
Re Piston. Via Mack's advice I found HOME Akunar Motorcycle Parts & Accessories Looks like for a 55mm bore Lifan 140 I can choose between:
* Pro-R, 12.45mm pin to deck, 2.00mm dome. AKRRP002-E
* Pro, 13.00mm pin to deck, 8.5mm dome. AKPRP009-D
Which one will go straight into a stock new Lifan 55mm bore 140cc engine? I sent Akunar a message but they are on holidays for another 2 weeks. When my engine is say 50 hrs old, should I install a new cylinder with a new piston? I assume the bore is not plated.
Re IRK and balancing: No need for a test ride. I am dead keen on less rotating mass. Ques: Is no balancing method/check ever an issue in terms of reliability?
Oil slinger (alum): Again less rotating mass. But where to buy? ebay web link or search keywords? I did some searches but came up empty. Saving 700g in rotating mass sounds very attractive.
Re extern inline oil filter: Mack, was the system you saw effective? Custom job or retail parts? Reasons for asking: I drained the "transport oil" before the first start up. After 10 mins running on a good mineral oil I drained again. Out came loads of metal "filings". Mostly manufacturing swarf I think. Coming off Jap bikes, this just made me realise that the zero filter and zero oil screen concept a bit weird since crap just circulates until it is ground into small enough pieces.
Magnetic oil drain plug. For anyone curious, I measured it up as a M12, 1.5mm pitch, 15mm long thread. I shall buy one on ebay. I must have item - particularly with no oil filter.
Valve clearances: I set mine at 003 intake and 004 exhaust (or a little looser). They were both real tight at 0025 each. Ques: How often do they need checking? Anyone else found they needed to remove the bash plate to check the exhaust valve clearance?
I've not even ridden my MSO 140SR yet. Well not properly ridden it on a track. Too wet! But I've fully assembled it and thinking about some (future) simple engine mods for more a little more throttle response and other gains.
So my questions for Mack or anyone else ...
Re Piston. Via Mack's advice I found HOME Akunar Motorcycle Parts & Accessories Looks like for a 55mm bore Lifan 140 I can choose between:
* Pro-R, 12.45mm pin to deck, 2.00mm dome. AKRRP002-E
* Pro, 13.00mm pin to deck, 8.5mm dome. AKPRP009-D
Which one will go straight into a stock new Lifan 55mm bore 140cc engine? I sent Akunar a message but they are on holidays for another 2 weeks. When my engine is say 50 hrs old, should I install a new cylinder with a new piston? I assume the bore is not plated.
Re IRK and balancing: No need for a test ride. I am dead keen on less rotating mass. Ques: Is no balancing method/check ever an issue in terms of reliability?
Oil slinger (alum): Again less rotating mass. But where to buy? ebay web link or search keywords? I did some searches but came up empty. Saving 700g in rotating mass sounds very attractive.
Re extern inline oil filter: Mack, was the system you saw effective? Custom job or retail parts? Reasons for asking: I drained the "transport oil" before the first start up. After 10 mins running on a good mineral oil I drained again. Out came loads of metal "filings". Mostly manufacturing swarf I think. Coming off Jap bikes, this just made me realise that the zero filter and zero oil screen concept a bit weird since crap just circulates until it is ground into small enough pieces.
Magnetic oil drain plug. For anyone curious, I measured it up as a M12, 1.5mm pitch, 15mm long thread. I shall buy one on ebay. I must have item - particularly with no oil filter.
Valve clearances: I set mine at 003 intake and 004 exhaust (or a little looser). They were both real tight at 0025 each. Ques: How often do they need checking? Anyone else found they needed to remove the bash plate to check the exhaust valve clearance?
