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This is a discussion on Stunt Build/More Power Questions within the Grom Talk forums, part of the Honda Grom Forums category; Originally Posted by solidjohnny Are you running the GF manual tensioner? No sir, I am not. Although I've considered it for my next round of ...

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  1. #181
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    Quote Originally Posted by solidjohnny View Post
    Are you running the GF manual tensioner?
    No sir, I am not. Although I've considered it for my next round of upgrades. I ordered the Yuminashi cam chain and upgraded tensioner, the upgraded tensioner rod and brass button. Just under $45 shipped to my door from them. A few OEM Honda gaskets, a new OEM rubber wheel and cam sprocket, set of Koso big bore gaskets, plus a few other little things while it's down. Another $150 or so and a few hours is a price I can live with, especially knowing that things are being upgraded.

    Also as a footnote, there's around 3500 miles on the stock timing chain, and probably around 2500 on the big bore.

    Got a set of Z&Z rearsets on the way with passenger pegs as well. Fitting the Hindle exhaust will require a bit of fabrication work. The brake master has to be flipped, so I don't think I could just buy the chimera exhaust bracket.

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    Big shout out to webike.... I have no idea how you guys got me this cam chain from Japan as fast as you did, but damn am I impressed. Since the Yuminashi junk won't work with a Koso 4v head, this was my plan B. This chain better be die hard like it says on the box!

    Also, a Grom Fatherz manual timing chain tensioner is en route. Waiting on some backorder parts, then its go time on everything.

    The Z&Z rearsets for the Grom finally arrived and also the rearsets and sliders for my girlfriends Z125. Good quality pieces here. I'm happy with everything I've ordered from them thus far. The fit and finish is everything you would want and expect.

    Sent from my SAMSUNG-SM-G935A using Tapatalk
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  3. #183
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    My buddy has those Z&Z rear sets with a Hindle. It vibrates your feet really bad. Not sure if its from the muffler being hard mounted to the rear set, or the solid foot pegs. I have Sato rearsets that are all hard mounted too, and have the same crazy vibrations to my feet. We're gonna find a way to get rubber between the muffler and rearsets.
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    Quote Originally Posted by Paultergeist View Post
    It seems like there is always one more thing to buy, THEN I’ll really notice a difference in performance.

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  5. #184
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    Quote Originally Posted by solidjohnny View Post
    My buddy has those Z&Z rear sets with a Hindle. It vibrates your feet really bad. Not sure if its from the muffler being hard mounted to the rear set, or the solid foot pegs. I have Sato rearsets that are all hard mounted too, and have the same crazy vibrations to my feet. We're gonna find a way to get rubber between the muffler and rearsets.
    You know, I wonder if something similar to the stock rubber exhaust mount bushing would work well. I'm going to either have to drill a hole, or make an adapter plate off the brake master studs. Maybe take some sway bar end link bushings from a car or truck and make them work. Just one between the exhaust and rearset should do the trick. Good looking out on that Johnny!

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    Shout out to Grom Fatherz for the manual cam chain tensioner, this arrived here in 2 days which was awesome. It is a nice quality piece. The stock one is a weak design with that flimsy spring IMO.

    Hopefully between these two things, my timing chain issues will be solved. Once I get my backorder parts, it's back on the road.

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    The only hard part is knowing how tight to make the cam chain. I made a bushing out of 3/8" fuel hose and sandwiched it between my muffler and rearset. It did help a good bit.
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    Quote Originally Posted by Paultergeist View Post
    It seems like there is always one more thing to buy, THEN I’ll really notice a difference in performance.

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    This little grenade is almost ready to get popped back in the Grom frame, and back to business.

    Waiting on a few little things to complete the engine build, new cam sprocket and bolt, clutch cover gasket, etc. I just threw the old one on to get a rough estimate of where I should be with the manual cam chain tensioner.

    The stock tensioners really are trash when you beat these bikes hard. I had the same gouges in my cylinder as Cisco did from the chain hitting the walls. And I'm only going to 10k RPM. Hopefully the HD chain and manual tensioner will cure that problem.

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    Same with the stock tensioner on the NEO 181 2,000 miles, chain gouges top of galley where cylinder meets head. This new build I put the GF manual tensioner in and went with a new stock cam chain. Already have 1000 miles on it and no gouges yet.
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    2017 Grom
    Koso 4V GF Ported / Drowsports 181 piston / Takegawa Oil Pump, Cam Chain Tensioner, Crank Support Kit & Catch Can
    Koso 34mm TB GF Ported / DynoJet PCV, WB2 & AFR / GF Manual Cam Chain Adjuster
    Drow Sports CF Intake & Oil Cooler / Hindle Exhaust / OPMID 2 Temp Gauge
    Kitaco Clutch Cover / SMR 6 Disc Clutch & 60% Springs / Chimera Clutch Plate
    RacingBros Adj Fork Kit and Shicane HLR Shock / Vagabond Fender Eliminator
    Seat Concepts

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    Quote Originally Posted by Djezspin View Post
    Same with the stock tensioner on the NEO 181 2,000 miles, chain gouges top of galley where cylinder meets head. This new build I put the GF manual tensioner in and went with a new stock cam chain. Already have 1000 miles on it and no gouges yet.
    Always nice when you can confirm your hypothesis!

    How did you go about setting the tensioner? By ear listening for any chatter or whining, or just pick up majority of the slack with it and run it? And have you had to adjust it at all?

    Sent from my SAMSUNG-SM-G935A using Tapatalk

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    I adjusted it with the cam cover off so I could feel the slack on the chain before it rolls onto the cam gear. rotated the cam a few times, checked it again. Fired the bike up and listened and didn't need to adjust any further. And no I haven't needed to adjust it yet. I've had the motor apart a few times as well and I back the tensioner down 2 turns prior to pulling cam gear off and each time I've put the motor back together it would take 2 turns to get my tension set again. I'm impressed so far.
    2017 Grom
    Koso 4V GF Ported / Drowsports 181 piston / Takegawa Oil Pump, Cam Chain Tensioner, Crank Support Kit & Catch Can
    Koso 34mm TB GF Ported / DynoJet PCV, WB2 & AFR / GF Manual Cam Chain Adjuster
    Drow Sports CF Intake & Oil Cooler / Hindle Exhaust / OPMID 2 Temp Gauge
    Kitaco Clutch Cover / SMR 6 Disc Clutch & 60% Springs / Chimera Clutch Plate
    RacingBros Adj Fork Kit and Shicane HLR Shock / Vagabond Fender Eliminator
    Seat Concepts

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