Engine modification questions
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Joined: Apr 2013
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From: Japan
Engine modification questions
I finally got the bike through Japanese inspection and she is running good. I want to thank all of you who helped and supported me through some of my idiotic questions and others who told me how to do certain things. I have now cleaned up all of my mess and have inventoried my excess parts. I have a new Delkron (bottom breather) bottom end, Andrews EV 13 cam, new lifters and push rods, gaskets and other misc. parts. I have found an individual that has a new set of Axtell cylinders with a new set of 10.5:1 Wiseco pistons and a new set of EVO heads. I am not even going to say the price as it is unbelievably cheap. I think I will need a different cam and possibly some head work to make this set up work. I know I have a new motor in my bike now, but for a few hundred extra I can have a spare too. What are your opinions or ideas on this set up. Thanks in advance
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Joined: Apr 2013
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From: Japan
The Delkron case is 3 5/8 bore with a 4.5 inch stroke. I bought them while waiting for a machining estimate for my original cases. I thought it was going to be too expensive for mine, but ended up getting my bottom end rebuilt. It was also going to be a PITA to get the registration done with a different VIN on the cases.
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From: almost there
As Spanner said those 10.5-1 pistons are going to invite Pinging. Staying just under or at 10-1 would be easier to tune out the ping.
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From: la la land jerzey
what you do to yours is your thing
the only way is to add an additive to the fuel so the back side of the engines combustion after ( 14* ATDC ) the left over fuel is being used up by the additive < the key to this-- Then and only then will you be able to run more compression
and no its proprietary what we use
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From: almost there
So John, you are saying they had Pinging and did nothing about it to the point of melting pistons? There are a lot of 10-1 engines out there that are doing just fine right?
Actually I was trying to steer the OP away from going 10-1 or larger.
My 10-1 Cr shows no sign of pinging now that it is tuned properly even in this 90*+ heat. I also checked my spark plugs and there is no dark speckles on the insulator, even under magnification, a great indicator for pinging.
Actually I was trying to steer the OP away from going 10-1 or larger.
My 10-1 Cr shows no sign of pinging now that it is tuned properly even in this 90*+ heat. I also checked my spark plugs and there is no dark speckles on the insulator, even under magnification, a great indicator for pinging.
Last edited by aces&8s; Jul 7, 2014 at 11:31 AM.
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From: la la land jerzey
So John, you are saying they had Pinging and did nothing about it to the point of melting pistons? There are a lot of 10-1 engines out there that are doing just fine right?
Actually I was trying to steer the OP away from going 10-1 or larger.
My 10-1 Cr shows no sign of pinging now that it is tuned properly even in this 90*+ heat. I also checked my spark plugs and there is no dark speckles on the insulator, even under magnification, a great indicator for pinging.
Actually I was trying to steer the OP away from going 10-1 or larger.
My 10-1 Cr shows no sign of pinging now that it is tuned properly even in this 90*+ heat. I also checked my spark plugs and there is no dark speckles on the insulator, even under magnification, a great indicator for pinging.
in a shop we address this almost every day and since 1965 i have built a couple of motors and seen the changes that have come about with the fuel we now use verses the days of 100 leaded gas
if yours works - well thats great - the buying public usually dont want to be on the razors edge when it comes to the engine they drive every day
