Author Topic: YZ250H Bits  (Read 2196 times)

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Offline Cabmkr

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YZ250H Bits
« on: September 26, 2013, 09:49:27 pm »
     I was wondering what people are using for new throttle (and cable) and also the tube from the intake to the YEIS box. Heater hose seams too big and not flexable enough, I was thinking the clear braided hose. The throttle tubes I have are cracked and broken at the end (i was thinking of fixing them by cutting the end clean and grafting on a good end with a thin layer of fiberglass) And the hoses are of course hard after 32 years. 

Cheers, Chris
Current rides/projects 75 MX125B, 75 TY250B, 75 Carabella Rally 175, 76 TT500 Ice bike, 78 IT400E 79 CB750F , 81 XS650H Street Tracker, 81 YZ250H X2, 93 DS80

Offline Rookie#1

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Re: YZ250H Bits
« Reply #1 on: September 26, 2013, 09:52:09 pm »
     I was wondering what people are using for new throttle (and cable) and also the tube from the intake to the YEIS box. Heater hose seams too big and not flexable enough, I was thinking the clear braided hose. The throttle tubes I have are cracked and broken at the end (i was thinking of fixing them by cutting the end clean and grafting on a good end with a thin layer of fiberglass) And the hoses are of course hard after 32 years. 

Cheers, Chris

Not sure about the boost bottle hose but the throtle tube is easily replaced, go into any bike shop and have a flick through MCS catalogue and you will find a new replacement item under the yamaha section. Shouldn't be anymore than around $19.95
THE SEXMAX.....coming soon to an Evo race near you!!! Lining up right along side the soon to be released TEDMAX!!!


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Offline Cabmkr

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Re: YZ250H Bits
« Reply #2 on: September 26, 2013, 10:24:59 pm »
Quote
throtle tube is easily replaced, go into any bike shop and have a flick through MCS catalogue and you will find a new replacement item under the yamaha section. Shouldn't be anymore than around $19.95

The problem with the throttle tube is it is a bevel gear and the cable attaches to the gear on top not the throttle tube so likely the std spec cable will be too short.
Current rides/projects 75 MX125B, 75 TY250B, 75 Carabella Rally 175, 76 TT500 Ice bike, 78 IT400E 79 CB750F , 81 XS650H Street Tracker, 81 YZ250H X2, 93 DS80

Offline Rookie#1

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Re: YZ250H Bits
« Reply #3 on: September 26, 2013, 10:29:24 pm »
Quote
throtle tube is easily replaced, go into any bike shop and have a flick through MCS catalogue and you will find a new replacement item under the yamaha section. Shouldn't be anymore than around $19.95

The problem with the throttle tube is it is a bevel gear and the cable attaches to the gear on top not the throttle tube so likely the std spec cable will be too short.

Sack the whole geared throttle and change it to a std yamaha throttle on YZ/IT K-L, the G/H throttle is stupidly expensive to buy replacement parts for and take way more effort than should be required to twist on power!!
THE SEXMAX.....coming soon to an Evo race near you!!! Lining up right along side the soon to be released TEDMAX!!!


CHECK OUT THE NEW FACEBOOK PAGE FOR VERi. VINTAGE ENDURO RIDERS INCORPORATED.

.https://www.facebook.com/pages/VERi-Vinduro/169617676550236

Offline tony27

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Re: YZ250H Bits
« Reply #4 on: September 27, 2013, 04:43:28 am »
Ditch the standard throttle & use a gunnar gasser with venhill throttle cable from vmx unlimited, I can't remember the cable number but Les does list & stock the correct one. That's what I run on my 465H
« Last Edit: September 27, 2013, 05:52:24 pm by tony27 »

Offline torm92

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Re: YZ250H Bits
« Reply #5 on: September 27, 2013, 06:43:54 am »
I made a throttle tube out of aluminium a few years ago. Was quite an operation as I had to cut the gear as well. Now I own it forever.
Restoring YZ 50,60, 80, 100 and 125. Racing a 490 and a 250. Have a complete collection of J,s.