Planet Minis

honda_xrs85 · 10-29-2009, 01:59 PM

So it wasn't the spigot pinching as the motor turned over fine and didn't have any spots where the piston bound, so I can rule that out. The IRK swap did nothing.

honda_xrs85 · 10-29-2009, 02:02 PM

Quote:

Originally Posted by firepower354

Piston looks to be well below the top at TDC. We have to cut 1.5-2mm off the 106's to get things all squeezey, maybe you'll need to as well? Clay or soft solder is your pal. Shoot for .030" at the tightest spot, .060-ish for the valves.

The pinch is common on 88's and a few others. Scuffs the snot outta the skirts.

The piston was exactly at TDC according to the marks on the flywheel. I'm going by the "T" mark on the flywheel, if that is correct.

So you're talking about taking some material off the top of the cylinder?

fatcaaat · 10-29-2009, 02:06 PM

Quote:

Originally Posted by honda_xrs85

The crank is a 54mm, this motor has the longer studs and a 84L timing chain.

That is not necessairly correct. Some of the older taky cranks (period correct for that head) used a 69mm tall cylinder and was only 52mm. Just as an FYI.

It really looks like there is not enough squeeze as the head gasket is thick and the piston sits below the deck. Also, validate that your rocker adjustments are on. .003 on the intake and .004 on the exhaust.

honda_xrs85 · 10-29-2009, 02:15 PM

Quote:

Originally Posted by fatcaaat

That is not necessairly correct. Some of the older taky cranks (period correct for that head) used a 69mm tall cylinder and was only 52mm. Just as an FYI.

It really looks like there is not enough squeeze as the head gasket is thick and the piston sits below the deck. Also, validate that your rocker adjustments are on. .003 on the intake and .004 on the exhaust.

If that's the case that it's 52mm crank, it still would not feel like a 119. Thanks for letting me know that, I'll verify if it's a 52 or 54mm.

So what is the best suggestion here, run a thinner head gasket or shave the cylinder down? The Two brothers manual for this kit said to run the clearances at .08mm and so I set both of them at that. I'm sure it really doesn't matter at the moment because I still need to figure out why it's lacking power.

honda_xrs85 · 10-29-2009, 02:19 PM

Another thing, the kickstarter just goes through the motion and doesn't turn the motor over. It acts like the clutch is pulled in. By the way, this motor has a Takegawa special clutch kit with the 3 speed tranny. When the clutch is adjusted all the way out so there is plenty of free play in the lever, it still does it. It only goes away when the bike warms up.

I'm wondering if this issue is somehow related to the issue of it lacking power. The clutch does not feel like it's slipping.

I've checked to make sure I have all the washers in the correct places on the clutch.

fatcaaat · 10-29-2009, 02:47 PM

I'd loosen up those rockers a bit. Move them to my recommendation and try it.

I think you are losing a lot of squeeze...It costs money to deck the cylinder but is cheapie cheap to run a TB 54mm head gasket. You can try that. Also, replace the plug and gap it to .025"

As for the clutch...unless it is slipping you won't lose power. One way to find out though, huh? you could replace the discs with new trx90 versions if you want cheap.

Finally, if you are running a vm26 carb, what's your jetting? At sea level you should be about 22.5/180 give or take a size with a wide open carb.

honda_xrs85 · 10-29-2009, 11:44 PM

I'll order up one of the TB head gaskets and see how that works out. As of right now, the bike feels a lot better in the power department. The rear tire was actually spinning on the rim, as I had forgot to add a rim lock. The clutch was also slipping a little. The bike is completely different than a 117. The power on this seems to be all up top, where the 117 pulled hard down low.

10-29-2009, 01:59 PM	#21 (permalink)
honda_xrs85 1st Gear Member Join Date: Feb 2008 Location: Spokane, WA Posts: 157	Re: Takegawa 124 Superhead Issues So it wasn't the spigot pinching as the motor turned over fine and didn't have any spots where the piston bound, so I can rule that out. The IRK swap did nothing.

10-29-2009, 02:19 PM	#25 (permalink)
honda_xrs85 1st Gear Member Join Date: Feb 2008 Location: Spokane, WA Posts: 157	Re: Takegawa 124 Superhead Issues Another thing, the kickstarter just goes through the motion and doesn't turn the motor over. It acts like the clutch is pulled in. By the way, this motor has a Takegawa special clutch kit with the 3 speed tranny. When the clutch is adjusted all the way out so there is plenty of free play in the lever, it still does it. It only goes away when the bike warms up. I'm wondering if this issue is somehow related to the issue of it lacking power. The clutch does not feel like it's slipping. I've checked to make sure I have all the washers in the correct places on the clutch.

10-29-2009, 02:47 PM	#26 (permalink)
fatcaaat 3rd Gear Member Join Date: Sep 2004 Location: Arlington, VA Posts: 3,778	Re: Takegawa 124 Superhead Issues I'd loosen up those rockers a bit. Move them to my recommendation and try it. I think you are losing a lot of squeeze...It costs money to deck the cylinder but is cheapie cheap to run a TB 54mm head gasket. You can try that. Also, replace the plug and gap it to .025" As for the clutch...unless it is slipping you won't lose power. One way to find out though, huh? you could replace the discs with new trx90 versions if you want cheap. Finally, if you are running a vm26 carb, what's your jetting? At sea level you should be about 22.5/180 give or take a size with a wide open carb.

10-29-2009, 11:44 PM	#27 (permalink)
honda_xrs85 1st Gear Member Join Date: Feb 2008 Location: Spokane, WA Posts: 157	Re: Takegawa 124 Superhead Issues I'll order up one of the TB head gaskets and see how that works out. As of right now, the bike feels a lot better in the power department. The rear tire was actually spinning on the rim, as I had forgot to add a rim lock. The clutch was also slipping a little. The bike is completely different than a 117. The power on this seems to be all up top, where the 117 pulled hard down low.

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