NHK GP Prime 2021 digadang-gadang sebagai penantang berat KYT TT Course. Bahkan beberapa review tentang GP Prime banyak yang mengatakan unggul dari TT Course dibeberapa sektor.
kotakhelm.com mencoba mengkomparasi kedua helm ini untuk melihat perbedaan kedua helm full face kelas menengah ini. Berikut ulasannya,
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| INFORMASI LAINNYA | REVIEW | REVIEW | |
| SPESIFIKASI | SPESIFIKASI | ||
| WARNA | WARNA | ||
| KOMPARASI | KYT TT Course | NHK GP Prime | |
| HARGA | Solid | Rp 850.000 | Rp 875.000 |
| Grafis | Rp 950.000 | Rp 975.000 | |
| Grafis SE | n/a | Rp 1.050.000 | |
| Grafis Replika | Rp 1.150.000 | Rp 1.050.000 | |
| RILIS | Diumumkan | 2020 | 2021 |
| MEREK | Manufaktur | KYT | NHK |
| SERI | Tipe Helm | Full Face | Full Face |
| FUNGSI | Pemakaian | Harian, Touring | Harian, Touring |
| SHELL | Material | Thermoplastic | Thermoplastic |
| Berat | 1.450 gram | 1.650 gram | |
| Ukuran Batok | M L | All Size | |
| Ukuran Padding | XS S M L XL XXL | S M L XL | |
| VISOR | Jumlah | 1 | 2 (dobel visor) |
| Jenis | Flat Visor | Flat Visor | |
| Fitur | Quick Release, Anti Fog Pin, tear off pin | Quick Release, Anti Fog Pin | |
| SAFETY | Kancing | Double D Ring | Microlock |
| Standar | SNI DOT ECE | SNI DOT | |
| Darurat | n/a | Emergency Release | |
| INTERIOR | Busa Pipi | Bisa dilepas | Bisa dilepas |
| Crown Pad | Bisa dilepas | Bisa dilepas | |
| Kelengkapan | Nose guard, Chin guard | Nose guard, Chin guard | |
| AIRFLOW | Lubang Ventilasi | Chin vent, front vent, top vent, rear vent | Chin vent, front vent, top vent, rear vent |
| Jumlah Vent | 8 | 6 | |
| Spoiler | Ya | Ya | |
| LAINNYA | Fitur | Eye glasses fit, | Eye glasses fit, emergency release, lubang intercom |
| Bonus | Sarung helm | Sarung helm, stiker, pinlock 70 | |
