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Another custom nice engine
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<blockquote data-quote="fatcaaat" data-source="post: 202297" data-attributes="member: 1656"><p>Alright an update for you all. Lots of work, rethinking, adjusting, tweaking, but the motor is now up and running, appears to have great power, not making any funny noises and there is no longer any fairy dust or bits in the oil. FInally! Here's how it all went down. </p><p></p><p>I found a puller that allowed me to remove the cam gear off the crank without taking things apart or welding something and sacraficing the gear. So that's a good thing. I ended up, as expected with an 87t chain, comprised of a master and a halflink. Am I happy about that? No. But this size chain is the same size chain that runs starters, large bikes, and even serves as the running chain for many scooters...i have to think that it shouldn't be a problem in this motor but time will tell. </p><p></p><p>The cheap chinese engine studs stretched when I put 14lbs on them over and over and over again. So much so, that one of them snapped. I suppose that's a repeated stress issue. I ditched them and put real TRX90 studs on them and just holding the two in your hand you can tell the difference right away. To get the timing right, I clocked the crank sprocket to the tooth instead of the space when installing it and it resulted in the dot on the cam gear being perfect. I also decided to use a slightly thicker head gasket from .25mm to .50mm. Also, I am not using the piston that cam matched to the head because that required me to stack spacer under the cylinder. I am now using the piston that came with the cylinder and crank combo and it requires no spacers or anything funny. The profile of the kitaco piston looked much better than the one the head came with anyway, so no loss there. </p><p></p><p>Everything seems to be working correctly now except my 12v DC power. I must have knocked something loose along the way but i only have AC lights and lost everything that was DC related. Should be an easy enough fix so not particularly concerned. </p><p></p><p>I'm not yet ready to make a call on what I think of this whole kit. Part of the issues were related to the major customization I did to the bottom end to begin with, but I'm still thinking that even if I put this on an otherwise stock Honda Nice bottom end, there are going to be issues with the cam chain length that will need to be corrected using a halflink and reclocking the gear on the crank. Not a hard thing to do, but knowing that it needs to be done was a world of discovery through trial and error. </p><p></p><p>THe plan is to put the other kit on an otherwise all stock motor. Alternatively, I have been considering putting it on top of a honda SL70 at 95cc and make it a screamer. I haven't decided the right course of action yet.</p></blockquote><p></p>
[QUOTE="fatcaaat, post: 202297, member: 1656"] Alright an update for you all. Lots of work, rethinking, adjusting, tweaking, but the motor is now up and running, appears to have great power, not making any funny noises and there is no longer any fairy dust or bits in the oil. FInally! Here's how it all went down. I found a puller that allowed me to remove the cam gear off the crank without taking things apart or welding something and sacraficing the gear. So that's a good thing. I ended up, as expected with an 87t chain, comprised of a master and a halflink. Am I happy about that? No. But this size chain is the same size chain that runs starters, large bikes, and even serves as the running chain for many scooters...i have to think that it shouldn't be a problem in this motor but time will tell. The cheap chinese engine studs stretched when I put 14lbs on them over and over and over again. So much so, that one of them snapped. I suppose that's a repeated stress issue. I ditched them and put real TRX90 studs on them and just holding the two in your hand you can tell the difference right away. To get the timing right, I clocked the crank sprocket to the tooth instead of the space when installing it and it resulted in the dot on the cam gear being perfect. I also decided to use a slightly thicker head gasket from .25mm to .50mm. Also, I am not using the piston that cam matched to the head because that required me to stack spacer under the cylinder. I am now using the piston that came with the cylinder and crank combo and it requires no spacers or anything funny. The profile of the kitaco piston looked much better than the one the head came with anyway, so no loss there. Everything seems to be working correctly now except my 12v DC power. I must have knocked something loose along the way but i only have AC lights and lost everything that was DC related. Should be an easy enough fix so not particularly concerned. I'm not yet ready to make a call on what I think of this whole kit. Part of the issues were related to the major customization I did to the bottom end to begin with, but I'm still thinking that even if I put this on an otherwise stock Honda Nice bottom end, there are going to be issues with the cam chain length that will need to be corrected using a halflink and reclocking the gear on the crank. Not a hard thing to do, but knowing that it needs to be done was a world of discovery through trial and error. THe plan is to put the other kit on an otherwise all stock motor. Alternatively, I have been considering putting it on top of a honda SL70 at 95cc and make it a screamer. I haven't decided the right course of action yet. [/QUOTE]
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