turbo 400 speedo gear

[HK1837]

What size tyres? HJ uses a 36 teeth white gear or 35 teeth pink gear or 34 teeth light green depending upon tyre diameter. Check your gear carrier to see what number of teeth gears it suits. I'd also recommend getting an internal seal for it too. It is difficult being totally certain on the tyre size as well as 2.78:1 stops at HJ and all the tyre options don't get listed until HX which is only 2.60:1.

Edit: HQ lists:

34 teeth 2.78 with F78x14, 7.35 x 14
35 teeth 2.78 with 7.35 x 14, EB78S x 14, 195 x 14
36 teeth 2.78 with 185 x 14, 70 x 14.

You'll have to check a few calculators online to see which tyres are closest to yours in diameter. You can buy 37-42 teeth online too if you need them eg http://www.ebay.com.au/itm/700R4-4L6...ht_2353wt_1170