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Discussion Starter #1
hi this is my up date on speed testing . I went out on a 50 mile round trip to day and it was interesting on one down hill run I hit 71mph at 8200rpm just in the red zone not to bad considering my 15 stone and 5.9 height the bike has now done 400 miles... speed as follows 50mph at 6000rpm in top 60mph at just over 7000rpm it holds 50 to 60 on normal flat ish roads and the slowest It went to day was 45mph up a 1 in 10 hill in 3 gear. the bike is also returning about 120mpg not bad mostly flat out . I hope this helps any one who has not got their bike yet I had a smile on my face nearly all day the forks did bottom out on me twice but the roads round me are in very poor condition I do sit a little further back on the bike than normal when flat out and it feels ok . hope this helps ajr uk
 

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Thanks, ajr. This is exactly the kind of info all of us who have never ridden one want to know. No vibration or a feeling the engine is about to explode at wide open throttle then? Do you think the MSX125 would let you ride wide open throttle on a carriageway at top speed day in and day out?
 

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Discussion Starter #6
hi aj nin it will let you run flat out all the time with no problems but you do get a lot more vibration at the top end rpm I can live with it just i love this little bike the black bird not got a look in since I bought this . I got it to go in the campervan but I can not stop riding it about all over the place its in its element in town it will out accelerate most cars at the lights smiles all the way ajr
 

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Discussion Starter #7
hi I am going to keep mine standard for now acceleration is very good from the lights ajr
 

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Heck completely stock it sounds like the Grom with have plenty of speed for my local roads.
 

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Heck completely stock it sounds like the Grom with have plenty of speed for my local roads.
+1 and add to that his mention of pulling away from cars at a stop. That just gave me the go-ahead to -1 the rear or +1 the front sprocket for a couple more MPH at the top
 

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Yeah ,I plan on going +1 in the front. Still looking for a company that sells front sprockets for the Grom though.
 

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We didn't put a 16T up on the site yet because, frankly the stock gearing is about all the Grom can pull as it comes from the factory and a 15 is going to be a struggle. Going to a 16 would require a lot more horsepower to get it to work. Not impossible and if there is a demand for 16T sprockets, we will add them. More rear sprockets coming in the next few days. Sprockets - Tyga Performance
 

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The other thing to note is that a bigger front sprocket with the same gearing as one with a smaller front and smaller rear, will mean more power loss so you are better going for small front sprocket and smaller rear.
 

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The other thing to note is that a bigger front sprocket with the same gearing as one with a smaller front and smaller rear, will mean more power loss so you are better going for small front sprocket and smaller rear.
hi paul , are you finding any particular set up run well ? thanks
 

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We didn't put a 16T up on the site yet because, frankly the stock gearing is about all the Grom can pull as it comes from the factory and a 15 is going to be a struggle. Going to a 16 would require a lot more horsepower to get it to work. Not impossible and if there is a demand for 16T sprockets, we will add them. More rear sprockets coming in the next few days. Sprockets - Tyga Performance
Paul, I would guess that with us Grom riders from the states going to big bore kits, you will see a demand for a 16 tooth.
 
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