
羽山的 KTM 算一算入手 6年,騎的不多,第一次換新胎

羽山 RC390 的後輪 BT090 150-60-17 下課

輪胎胎紋已到指示線,最近剛好扎到鐵釘漏風

漏風!!
扎到一根短釘

前陣子買了手動脫胎工具

第一次用橡皮就碎了

工具是不錯用,但再用心點就好了

後來羽山把支稱孔改成下面那個,角度比較正確

換個輪胎先修工具
這個 U 口要相容 17 吋胎,要扳平一些,用活動扳手夾著扳開

拔掉碎掉的橡皮

這個地方也會磨到

鉚釘會刮傷輪框

用 2.8mm、3.3mm 鑽掉

鑽大,敲掉

刷一刷,好了

先這樣,墊個布用用,之後再來修改

OK 稍微可以安心使用了

二邊都順利分離胎脣
工具很好施力,下壓力非常足

之後再改良

洗框

洗乾淨再施工

放到自製拆胎機

裝上鳥嘴特工

翻胎

翻好後轉一圈

第一層脫離

輪胎稍微推擠壓一壓

再度插入特工,這次要插過去

一樣靠在鳥嘴臂這裡

然後用黃色護框條扣著,再用另一支拆胎棒插到護胎條跟胎中間,往上翹

這樣胎脣就會剛好勾在鳥嘴臂,逆時針轉一下特工就可以把輪胎拿起來了

好了

BT090
羽山入手 RC390 時里程是 4500km,那時車主就換上這條
全新胎,只用到 9000km 左右就磨到指示線,勉強只能用到10000初頭
能用的里程大概就5000~6000km
只覺得壽命真的很短,那時新胎跑武嶺去花蓮,抓地力也沒有令我覺得相當安心
跑平地不錯,但山上下雨,路上有水,這種排水紋跟抓地力就不太好,輪胎太光頭
也許跑跑賽車場應該是很不錯,但這壽命就真的短
看看輪胎邊緣的胎屑,胎質偏軟,通勤稍浪費

目前的進度

拆下拆胎工具

輪框內部有之前輪胎的橡皮屑

這些要洗一洗刷一刷

拿去水龍頭沖,用菜瓜布把皮屑刷掉,輪框胎脣會碰到的地方手巡一巡
不平的地方可以用砂紙磨順

洗乾淨了

放回裝胎特工

輪胎氣嘴是原車用到至今,已10年,換個新的

另一面

之前買的氣嘴,我覺得這種的還不錯

分解,二個螺帽

然後碗華司、ORing、ORing、碗華司

這個感覺

橡皮抹些矽油

舊氣嘴,用鯉魚鉗夾著往外拉,然後用小刀割就可以切斷

切斷

氣嘴口

特寫

另一面

切斷的氣嘴,這種氣嘴用久,某一天打氣就會不小心扭斷漏氣

二面清潔

準備螺絲膠

抹矽油

裝入

Oring 在內側

抹些螺絲膠

鎖上螺帽,催緊,如果要算扭力的話,8~10NM 即可

然後再抹一些螺絲膠,再催緊,好了

緊固

氣嘴裝好了

二年前備的華豐 HF918 140-70-17
一直想把BT090 換掉,但又有點捨不得,一放就放了二年...XD

如果不想花太多錢在輪胎,華豐其實還OK啦...
新胎的抓地力也是夠
因為真的很耐用,一用就很多年還沒到指示線,胎質變差抓地力變差就要換掉

抹矽油

翻面

確認輕點的位置

二年前買的 哦哦 22 年 11週~

HF-918R 140-70-17
總之好處就只是便宜,耐磨
不要學

DURO 華豐

確認輪框旋轉方向,千萬不要裝錯邊...

裝上鳥嘴,壓入一角

轉一圈

一面裝好了

然後從鳥嘴臂往下壓

確認輕點不要離氣嘴太遠

剛好小黑回來幫忙壓,邊壓邊轉

順利裝入,感恩

兩光的工具,但自己換胎也是勘用,感覺滿意
自己裝胎也曾是羽山覺得玩車最麻煩的事情,現在覺得還好
裝完的心情一樣
「早個十年、二十年就花時間作一組特工就好了」

抹了矽油輪胎很滑,轉一下對到

好了

打氣

打到 40psi 啵啵啵啵

再放到平常用的 30psi

打氣完成

多的矽油擦掉

噴些肥皂水,確認沒有任何漏氣

氣嘴也噴一噴

翻面

另一面也測測,沒漏,相當好

輪胎裝好啦

Duro 140-70-17 貼紙撕掉

Done

碟盤螺絲順牙,把之前的螺絲膠去除
M8xP1.25

OK

重新抹螺絲膠裝入

上扭力

ABS 光閘輪,螺絲 M6xP1.0 順牙

順完牙螺絲都很好鎖

上膠

上扭力鎖上

中間軸承把水吹掉,再點一些機油潤滑

輪胎更換完成,感謝 BT090 的體驗與付出

星期一下班有空,整修特工
拿之前作打孔機剩的切割板來用,這個相當耐磨

寬 4cm 長 15cm

這

本來想用螺絲,但擔心螺絲會刮輪框,皿頭的好像也有點風險,先試試鑽孔拉束帶
上 AB 膠,束帶拉一拉

這邊針對會磨到的部分加強

鑽孔

側面也鑽孔

上 AB 膠,束帶拉一拉
維修完成,下次換胎可能要很久了