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TechTalk / Re: Compression Too High
« Last post by fret nut on April 25, 2017, 11:35:05 PM »
eBay sometimes.  It's why I have a couple extra motors.
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TechTalk / Re: Compression Too High
« Last post by ProphetOfDoom on April 25, 2017, 11:25:44 PM »
IF you have carbon deposits you will likely have to take the head off.  For sure the head will have to come off if you need rings or cylinder work.
I know that Yamaha and Vesrah do replacement valve seals, but rings? Can you get replacement rings?



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TechTalk / Re: Compression Too High
« Last post by fret nut on April 25, 2017, 11:18:13 PM »
Oily plug is not a good sign.  If the combustion chamber gets a lot of oil you likely have carbon deposits.  Excess oil can be from worn out valve stem seals, bad rings, or scored cylinder.  IF you have carbon deposits you will likely have to take the head off.  For sure the head will have to come off if you need rings or cylinder work.
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Off Topic / Re: Motogp
« Last post by fret nut on April 25, 2017, 10:51:31 PM »
I admire Valentino for his deep experience and his skill, remaining competitive for so many years.  He is an interesting person and will be in contention for the championship this year as long as he can consistently manage to get on the podium, though he will need to actually win some races to remain in the lead.  This is so far his best possibility to regain the championship, as he ages it becomes more difficult.  Kind of 'now or never'.  While the 'hot shots' battle it out and risk crashing Valentino will be waiting and watching for opportunities to score. One must finish the race in order to win, and he is good at finishing, and shows surprising speed on Sundays(race day).  His qualifying runs are still a bit lagging but they are only for grid placement.
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TechTalk / Re: Compression Too High
« Last post by Walt_M. on April 25, 2017, 04:06:57 PM »
Have you checked valve clearance lately?  Too tight valve clearance could cause low readings and, as someone already said,  carbon deposits could cause high readings.
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TechTalk / Re: Compression Too High
« Last post by WaterMover77498 on April 25, 2017, 03:24:23 AM »
Yep, I'll go borrow a gage. I am crazy busy at work next 10 days, so it will be a while before I can get the numbers. If it is my gage giving bad numbers, than the rear cylinder at 110 PSI (which is below lower limit, but I was hoping would come up with some miles on the motor) could be well below this number, and even more of a problem.

Since I have about 10 days before I can really put my hands on the bike, but would like to gather ideas about what to do once I have new compression readings, does anyone have experience correcting high compression?
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TechTalk / Re: Compression Too High
« Last post by Walt_M. on April 25, 2017, 01:43:15 AM »
Can you borrow a gauge from Auto Zone? It might be better than chasing the wrong problem. I would have serious doubt about any reading above 170.
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TechTalk / Re: Squeaking chirping sound from front cyclinder area
« Last post by Lucky on April 24, 2017, 09:40:52 PM »
Great job, and I'll bet you had that stethoscope huh? :)
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TechTalk / Re: Compression Too High
« Last post by WaterMover77498 on April 24, 2017, 07:31:41 PM »
The plug that is in the bike now looked pretty normal, but I replaced it about 20 miles ago. Unfortunately, those 20 miles took me since August 2016 to put on the bike. I think the previous plug was oily.

Maybe I'm the only peasant with only one compression tester, but yes, same gage each time.

Does anyone have any experience correcting high compression?
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General Board / Re: Struuner Precents himself!
« Last post by Struuner on April 24, 2017, 03:38:19 PM »
Good evening QBS,

Thank you for the pointers!

No such points in the steering. thank fully. I cannot remember clearly, but I think the guy from whom I bought it, said he changed that bearing.
After my rusty gasoline experience, the first thing I installed was an in-line fuel filter.
So far the charging system has held up. Nonetheless I will check the voltage and that connector
I haven't had the starter disassembled from the bike yet. If I read correctly on this forum. I might need to check the starter clutch holding bots (3x) as well. When I pick that up. I'll do that lipseal as well.
I also read about the rearbrake drum anchor rod bolts. I'll have to replace those as well ASAP.
It almost makes me happy that I hardly ever used that brake, as the bugs smashing into the front of the bike are generating more braking force than the rear brake ever did.

About the milage. Hehehe... :P

The counter says 32k Kilometers. BUT, and this is funny: it only counts the beautiful/ or nasty kilometers driven. Allow me to explain:
When, for example, I drive 150km the counter will say I've done 56km or if I would do that same trip on a different moment in time, it will say 87 or perhaps even 145. it just does something. I've checked: its not counting miles. Also, I've opened the mechanism, but couldn't really find worn cogwheels or such. so I just drop by a pertrolstation every 2 to 2.5 hours of driving.

I didn't know that the fairing one was so different. The bike, although showing some signs of usage, still seem to have all the oil and other liquid stickers on various places on the frame. also inside the fairing it stateds its an original yamaha fairing. that bike has done 33k km according its counter, which I think is possible/feasible. and I think/hope/(and quite unsafely) assume it is an originally faired bike by Yamaha and has all the items you listed.
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