Planet Minis

LE586 · 10-06-2009, 08:33 PM

I recently had some problems and bent the valves in my 07 ttr50. I haven't been able to find replacement valves for it but when I was looking I thought that I read that a 90 head will fit and increase power. Just wondering if anyone knows if valves are available and if that head would fit and if so do you use a 50 head gasket or a 90? It's a bike that I use to chase my daughter around on her Cobra so I'd like a little more power but I don't want to go overboard.

Paxracing · 10-06-2009, 08:38 PM

I dont think the 90 will fit your 50. If you cant find valves i have two stock tt50 heads in the shop. call or pm tomorrow.

YFZRider69 · 10-07-2009, 09:43 AM

This guy has a ttr90 head on his 50. Ask him how he did it.
Ttr pics

TyConway · 10-07-2009, 10:38 AM

Quote:

Originally Posted by LE586

I recently had some problems and bent the valves in my 07 ttr50. I haven't been able to find replacement valves for it but when I was looking I thought that I read that a 90 head will fit and increase power. Just wondering if anyone knows if valves are available and if that head would fit and if so do you use a 50 head gasket or a 90? It's a bike that I use to chase my daughter around on her Cobra so I'd like a little more power but I don't want to go overboard.

the 90 head will work, bolts right on, but since your engine is stock it will probably lose power due to the bigger combustion chamber that would lower your compression ratio. Mine is ported and polished and had custom larger valves and race cam installed on a 107cc Takagawa kit.
But i've seen several ttr50 heads on ebay this week, around 100 to 150 shipped.

YFZRider69 · 10-07-2009, 12:02 PM

How much would it cost to get the ttr90 head to work minus the porting. Also how much is the 107 kit. Just wondering. Might have to do that soon if it's not to expensive.

ItsBrett_205 · 10-08-2009, 11:37 AM

Quote:

Originally Posted by YFZRider69

How much would it cost to get the ttr90 head to work minus the porting. Also how much is the 107 kit. Just wondering. Might have to do that soon if it's not to expensive.

x2 does it give it a lot more power with the 90 head?

10-06-2009, 08:33 PM	#1 (permalink)
LE586 PM Newbie Join Date: Oct 2009 Posts: 1	ttr50 valves? or ttr90 head I recently had some problems and bent the valves in my 07 ttr50. I haven't been able to find replacement valves for it but when I was looking I thought that I read that a 90 head will fit and increase power. Just wondering if anyone knows if valves are available and if that head would fit and if so do you use a 50 head gasket or a 90? It's a bike that I use to chase my daughter around on her Cobra so I'd like a little more power but I don't want to go overboard.

10-06-2009, 08:38 PM	#2 (permalink)
Paxracing 3rd Gear Member Join Date: Mar 2004 Location: ca Posts: 5,517 My Mood:	Re: ttr50 valves? or ttr90 head I dont think the 90 will fit your 50. If you cant find valves i have two stock tt50 heads in the shop. call or pm tomorrow.

10-07-2009, 09:43 AM	#3 (permalink)
YFZRider69 PM Newbie Join Date: Mar 2009 Location: Puyallup, Washington Posts: 61 My Mood:	Re: ttr50 valves? or ttr90 head This guy has a ttr90 head on his 50. Ask him how he did it. Ttr pics

10-07-2009, 12:02 PM	#5 (permalink)
YFZRider69 PM Newbie Join Date: Mar 2009 Location: Puyallup, Washington Posts: 61 My Mood:	Re: ttr50 valves? or ttr90 head How much would it cost to get the ttr90 head to work minus the porting. Also how much is the 107 kit. Just wondering. Might have to do that soon if it's not to expensive.

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