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z1g


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how hot is your pipe.
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Got my heat/temp gun in today

Here is how hot the pipe gets idling for 5 minutes (timed)

Couple of pics of where i am aiming the gun (see attached) black image is about 30-1min after i switched bike off, slight glow. Can not be seen in pic

TEMPS In Celsius

Header pipe

2 min = 128.8

3 min = 191.0

4 min = 215.3

5 min = 330.0 (i think is not right, it was jumping around) *inconclusive really* 285-290??????

This seems very very hot to me.

Exhaust tip

2 min = 25.5

3 min = 27.5

4 min = 32.1

5 min+ = 35.5

Also i may be using the temp gun incorrectly... tried to have it about 20cm away from target

Its a cheap china unit btw... so may not be 100% accurate measuerd a heater that says 22c, gun says 32c?? 

 NOTE: garage has a heater set to 22c. Which was warming up during test.???? 

 





-- Edited by z1g on Tuesday 12th of June 2018 11:29:09 AM

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that is common...
ride it... the air flow will cool it..

stainless steel heats up a lot easyer than steel..


..

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 http://www.kiwibiker.co.nz

Bikes... 06 TTR250 / 09 XT660R / 1977 Montesa Cota 348 MRR / 1979 Montesa H6 125 Enduro...

E-mail  xtpete@gmail.com

z1g


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Thanks petenz.
Thats good to know. At least it is not GLOWING HOT after 3 minutes like it was :)

 

Edit : 2 hours later , went for a quick squirt around town ( about 8 minutes), as soon as i pulled in to garage hit it with temp gun.

Header pipe reading: 206.7c????





-- Edited by z1g on Wednesday 13th of June 2018 01:05:15 PM

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melting point of 304 stainless steel is 1400 - 1450 deg....
so you have a wee way to go before it falls into a molten
blob on the road

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 http://www.kiwibiker.co.nz

Bikes... 06 TTR250 / 09 XT660R / 1977 Montesa Cota 348 MRR / 1979 Montesa H6 125 Enduro...

E-mail  xtpete@gmail.com

z1g


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That is good news petenz.
Looks like i'd have to be revving the bejeus out of it :)
I asked as, i had a high reviving issue whilst riding (seems to have come good now)
And posted a pic of the bike just idling for about 3 minutes, and the header was glowing hot. WISH I HAD TEMP gun then!!!

This seems to have settled down as well now, as people i talked to seemed to indicate it was was just burning of crap in pipe??? As it had been sitting in shed for 3-4yrs before i bought it.

I have put on a massive 60kms to odo since buying it :)

I really do not know, other than last 4 times starting it, seems not to be this bad now. *phew*
Best wishes
Z

 



-- Edited by z1g on Saturday 16th of June 2018 12:48:16 PM

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z1g


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Not trying to bump thread.
Just adding whats happening my end.
Took bike for about 30min ride .... 23km actually. And freezing outside, 8c ... cold, but still love riding it.
Got home, header was red hot again. I really do not like the look of the header pipe glowing. Concerns me. And not sure its right.
hit it with the temp gun a few times , 146-156c....was the lower-upper reading.
impressed that it cools down quite quickly though...
hoping i am not doing any damage to it.
newbs with a ttr250. :)
z.

Edit: temp gun pic

 



-- Edited by z1g on Wednesday 20th of June 2018 12:29:53 PM

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I have never noticed the header glowing before. 8c is pretty cool I dont think it should be that hot in winter. I don't let mine idle for long periods though.
Maybe its jetted too lean?? How's the plug?



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z1g


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Put a new plug in about 80kms ago. Have not pulled it out since.
Another member (or two) suggested it may be running lean.
Will check it out and do a bit more research on it. I put the jets back to were they originally were set to.
i think there is a howto on carbs on the forum, think i better read this and get a basic understanding first.
Carbs confuse me :) but would be handy to learn abit about em, if i am going to make this bike a daily.
Best
Z

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z1g


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Bit of feedback.
My cousin dropped round this afternoon.
he has a mate, that works as a motocycle mechanic for a yamaha dealer.
He confirmed that hot header could be because of running lean, but also suggested something about value's not closing properly.
His recommendation was to rip the value cover off and check clearences, timing et al.
its all a bit double dutch to me. :)
He also recommends not riding it, unless i want to blow out a valve.
even my cousin whom has way more experience on bikes than me reckons it's getting to hot to quickly.
We let it idle for a few minutes, and he thinks something is not quite right.

Will wait and see what the mech finds out, and report back.
hopefully next couple weeks.
z

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i would say either fuel or timing issues

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